D
As they migrate（迁移），butterflies and moths choose the winds they want to fly with，and they change their body positions if they start floating in the wrong direction．This new finding suggests that insects may employ some of the same methods that birds use for traveling long distances．Scientists have long thought that insects were simply at the mercy of the wind．
Fascinating as their skills of flight are，migrating behavior has been difficult to study in insects because many long distant trips happthousands of feet above ground．Only recently have scientists developed technologies that can detect such little creatures at such great heights．
To their surprise，though，the insects weren’t passive travelers on the winds．In autumn，for example，most light winds blew from the east，but the insects somehow sought out ones that carried them south and they positioned themselves to navigate directly to their wintering homes．
Even in the spring，when most winds flowed northward，the insects didn’t always go with the flow．If breezes weren’t blowing in the exact direction they wanted to go，the insects changed their body positions to compensate．Many migrating birds do the same thing．
The study also found，butterflies and moths actively flew within the air streams that pushed them along．By adding flight speeds to wind speeds，the scientists calculated that butterflies and moths can travel as fast as 100 kilometers an hour．The findings may have real-world applications．With climate warming，migrating insects are growing in number．Knowing how and when these pests move could help when farmers decide when to spray their crops．
71．What’s the main idea of the text?
A．Insects migrate with the seasons．     B．Wind helps insects greatly in migrating．
C．Windsurfing insects have real direction．D．Scientists have trouble in observing insects．
72．Scientists originally thought that____________．
A．insects always waited for their favourable winds
B．insects chose the winds they wanted to ride
C．insects were just blown about by the wind
D．insects positioned themselves in the winds
73．It is not easy to stuay the migrating behavior of the insects because____________
A．the little creatures can fly very fast     B．they have no regular migrating courses
C．the wind’s direction is hard to foresee    D．their flight is long and high above ground
74．We can learn from the text that______________.
A．insects fly in the way birds do
B．insects travel more easily in autumn
C．insects never position themselves when flying low
D．insects rest a lot when the wind pushes them along
75．According to the passage，the findings can              ．
A．increase insects in number         B．instruct farmers when to spray
C．prevent climate warming       D．help protect insects

D

As school fl,tats again，there’s SO much mole for an American parent to nag(唠叨)about，like

homework，bedtime and lost hours on the Intemet．But in the age of digital childhood，Jacky Long-well，45，of McLean，Virginia，often text—messages(发短信)what she OnCe told her children bymouth_"Be nice to your brother；walk the dog；remember your reading．

This is the world of the modem family，in which even reminding children to do something has

become electronic．

There  are changes in how parents nag and in what they nag about and in the frequency of their

nagging．

With technology，“you nag more，and you are a little bit more：precise with your nagging．’’said

Reginald  Black，46，of Woodbridge，Virginia．

For many young people，electronic nagging is part of the experience of growing up．Charles Flowers，17，131．$enior at St．John“College High School in Washington．says his mothel-reminds him about everything from laundry，being Oil time to baseball practice and mowing the lawn by text．

When she uses capitals he knows she is serious：GET HOME!

Some say technology has made nagging less annoying．

Jaeky Longwell thinks texts ale less emotional than spoken messages and less likely to be resisted by teenagers．

It’s not as painful for them to hear it by text．It becomes grouped with the friendly communication，”she said．“They can’t hear the nagging．”

She thinks a good way to do it is to mix friendliness with nagging．A parent Call always start by

saying hello．

Not all parents like the new electronic r,agging．Joyce Bouehard，51，a mother of four in Fairfax，Virginia，texts her 14一year—old son but says that for many  things — chores，homework— the

old—fashioned way works better．Nagging by text has risks，she notes：I always think，if you are texting them something and they are with their friends，they ale getting a big laugh out of it．’’

68．We can conclude from the first two paragraphs that————————．

A．American children often stay up late studying

B．Jacky Long'well had a happy aigital childhood

C．American parents pay too much attention to their children’s studies

D．American parents think a lot about their children’s characters

69．The example of Reginald Black is used to show readers————————．

A．that her nagging is thoughtful

B．how the amount and kind of nagging have changed with the arrival of the digital age

C．the kind of skills a parent needs to nag effectively

D．that she likes nagging her children very much

70．We can infer that—————————．

A．It’S better for parents to nag in a friendly,way

B．whether、nagging is e]ectronic or not，it is annoying

C．American parents generally don’t like to nag

D．American parents like to llse capital letters in messages

7 1．The main idea of the article is———————一．

A．the subjects American parents like to nag about

B．the reaSOliS American parents like to nag their children

C．that electronic nagging is becoming commoll in the U．S

D．how American parents began to nag their children by text messages

  D

  As school fl,tats again，there’s SO much mole for an American parent to nag(唠叨)about，like

 homework，bedtime and lost hours on the Intemet．But in the age of digital childhood，Jacky Long-well，45，of McLean，Virginia，often text—messages(发短信)what she OnCe told her children bymouth_"Be nice to your brother；walk the dog；remember your reading．

  This is the world of the modem family，in which even reminding children to do something has

 become electronic．

  There  are changes in how parents nag and in what they nag about and in the frequency of their

 nagging．

  With technology，“you nag more，and you are a little bit more：precise with your nagging．’’said

 Reginald  Black，46，of Woodbridge，Virginia．

  For many young people，electronic nagging is part of the experience of growing up．Charles Flowers，17，131．$enior at St．John“College High School in Washington．says his mothel-reminds him about everything from laundry，being Oil time to baseball practice and mowing the lawn by text．

   When she uses capitals he knows she is serious：GET HOME!

  Some say technology has made nagging less annoying．

  Jaeky Longwell thinks texts ale less emotional than spoken messages and less likely to be resisted by teenagers．

  It’s not as painful for them to hear it by text．It becomes grouped with the friendly communication，”she said．“They can’t hear the nagging．”

  She thinks a good way to do it is to mix friendliness with nagging．A parent Call always start by

saying hello．

  Not all parents like the new electronic r,agging．Joyce Bouehard，51，a mother of four in Fairfax，Virginia，texts her 14一year—old son but says that for many  things — chores，homework— the

old—fashioned way works better．Nagging by text has risks，she notes：I always think，if you are texting them something and they are with their friends，they ale getting a big laugh out of it．’’

68．We can conclude from the first two paragraphs that————————．

  A．American children often stay up late studying

  B．Jacky Long'well had a happy aigital childhood

  C．American parents pay too much attention to their children’s studies

  D．American parents think a lot about their children’s characters

69．The example of Reginald Black is used to show readers————————．

  A．that her nagging is thoughtful

  B．how the amount and kind of nagging have changed with the arrival of the digital age

  C．the kind of skills a parent needs to nag effectively

  D．that she likes nagging her children very much

70．We can infer that—————————．

  A．It’S better for parents to nag in a friendly,way

  B．whether、nagging is e]ectronic or not，it is annoying

  C．American parents generally don’t like to nag

  D．American parents like to llse capital letters in messages

 7 1．The main idea of the article is———————一．

  A．the subjects American parents like to nag about

  B．the reaSOliS American parents like to nag their children

  C．that electronic nagging is becoming commoll in the U．S

  D．how American parents began to nag their children by text messages

  D

  As school fl,tats again，there’s SO much mole for an American parent to nag(唠叨)about，like

 homework，bedtime and lost hours on the Intemet．But in the age of digital childhood，Jacky Long-well，45，of McLean，Virginia，often text—messages(发短信)what she OnCe told her children bymouth_"Be nice to your brother；walk the dog；remember your reading．

  This is the world of the modem family，in which even reminding children to do something has

 become electronic．

  There  are changes in how parents nag and in what they nag about and in the frequency of their

 nagging．

  With technology，“you nag more，and you are a little bit more：precise with your nagging．’’said

 Reginald  Black，46，of Woodbridge，Virginia．

  For many young people，electronic nagging is part of the experience of growing up．Charles Flowers，17，131．$enior at St．John“College High School in Washington．says his mothel-reminds him about everything from laundry，being Oil time to baseball practice and mowing the lawn by text．

   When she uses capitals he knows she is serious：GET HOME!

  Some say technology has made nagging less annoying．

  Jaeky Longwell thinks texts ale less emotional than spoken messages and less likely to be resisted by teenagers．

  It’s not as painful for them to hear it by text．It becomes grouped with the friendly communication，”she said．“They can’t hear the nagging．”

  She thinks a good way to do it is to mix friendliness with nagging．A parent Call always start by

saying hello．

  Not all parents like the new electronic r,agging．Joyce Bouehard，51，a mother of four in Fairfax，Virginia，texts her 14一year—old son but says that for many  things — chores，homework— the

old—fashioned way works better．Nagging by text has risks，she notes：I always think，if you are texting them something and they are with their friends，they ale getting a big laugh out of it．’’

68．We can conclude from the first two paragraphs that————————．

  A．American children often stay up late studying

  B．Jacky Long'well had a happy aigital childhood

  C．American parents pay too much attention to their children’s studies

  D．American parents think a lot about their children’s characters

69．The example of Reginald Black is used to show readers————————．

  A．that her nagging is thoughtful

  B．how the amount and kind of nagging have changed with the arrival of the digital age

  C．the kind of skills a parent needs to nag effectively

  D．that she likes nagging her children very much

70．We can infer that—————————．

  A．It’S better for parents to nag in a friendly,way

  B．whether、nagging is e]ectronic or not，it is annoying

  C．American parents generally don’t like to nag

  D．American parents like to llse capital letters in messages

 7 1．The main idea of the article is———————一．

  A．the subjects American parents like to nag about

  B．the reaSOliS American parents like to nag their children

  C．that electronic nagging is becoming commoll in the U．S

  D．how American parents began to nag their children by text messages

D

       As they migrate（迁移），butterflies and moths choose the winds they want to fly with，and they change their body positions if they start floating in the wrong direction．This new finding suggests that insects may employ some of the same methods that birds use for traveling long distances．Scientists have long thought that insects were simply at the mercy of the wind．

       Fascinating as their skills of flight are，migrating behavior has been difficult to study in insects because many long distant trips happthousands of feet above ground．Only recently have scientists developed technologies that can detect such little creatures at such great heights．

       To their surprise，though，the insects weren’t passive travelers on the winds．In autumn，for example，most light winds blew from the east，but the insects somehow sought out ones that carried them south and they positioned themselves to navigate directly to their wintering homes．

       Even in the spring，when most winds flowed northward，the insects didn’t always go with the flow．If breezes weren’t blowing in the exact direction they wanted to go，the insects changed their body positions to compensate．Many migrating birds do the same thing．

       The study also found，butterflies and moths actively flew within the air streams that pushed them along．By adding flight speeds to wind speeds，the scientists calculated that butterflies and moths can travel as fast as 100 kilometers an hour．The findings may have real-world applications．With climate warming，migrating insects are growing in number．Knowing how and when these pests move could help when farmers decide when to spray their crops．

71．What’s the main idea of the text?

       A．Insects migrate with the seasons．      B．Wind helps insects greatly in migrating．

       C．Windsurfing insects have real direction．D．Scientists have trouble in observing insects．

72．Scientists originally thought that____________．

       A．insects always waited for their favourable winds

       B．insects chose the winds they wanted to ride

       C．insects were just blown about by the wind

       D．insects positioned themselves in the winds

73．It is not easy to stuay the migrating behavior of the insects because____________

       A．the little creatures can fly very fast     B．they have no regular migrating courses

       C．the wind’s direction is hard to foresee    D．their flight is long and high above ground

74．We can learn from the text that______________.

       A．insects fly in the way birds do

       B．insects travel more easily in autumn

       C．insects never position themselves when flying low

       D．insects rest a lot when the wind pushes them along

75．According to the passage，the findings can               ．

       A．increase insects in number          B．instruct farmers when to spray

       C．prevent climate warming        D．help protect insects