5．If I had the chance.I a business at my university that would benefit my classmates．( )A．star——青夏教育精英家教网——

5．If I had the chance，I _____ a business at my university that would benefit my classmates．（　　）

	A．	started		B．	would start
	C．	had started		D．	would have started

4．We are in complete agreement with the suggestions _____ in your letter．（　　）

3．The total number of shared bikes，_____ are easy to rent through smartphone apps，is increasing rapidly．（　　）

2．I gave some money to John，_____ house was destroyed in the flood．（　　）

1．Hummingbirds （蜂鸟） are one of nature's most energetic fliers and the only birds to hover in the air by relying on their strength alone．
Now scientists have found that it is the ratio （比值） of the bird's wing length to its width that makes them so efficient．The discovery is helping experts compete with 42 million years of natural selection to build helicopters that are increasingly efficient．
David Lentink，an assistant professor at Stanford University in California，tested wings from 12different species of hummingbirds，which he sourced from museums．He placed them on a machine used to test the aerodynamics （气力学） of the helicopter blades （桨叶）．Professor Lentink's team used the same machine to test the blades from an advanced micro-helicopter used by the UK's army．They found that the micro-helicopter's blades are as efficient at hovering as the average hummingbirds．
But while the micro-helicopter's blades kept pace with the average hummingbird wings，they could not keep up with the most efficient hummingbird's wing．The wings of Anna's hummingbird were found to be about 27 percent more efficient than the man-made micro-helicopter's blades．
While Professor Lentink wasn't surprised at nature's superiority，he said that helicopter blades have come a long way．"The technology is at the level of an average hummingbird，"he said．"A helicopter is really the most efficient hovering device that we can build．The best hummingbirds are still better，but I think it's amazing that we're getting closer．It's not easy to match their performance，but if we build better wings with better shapes，we might match hummingbirds．"
Professor Lentink said that we don't know how hummingbirds maintain their flight in a strong wind，how they navigate （确定方向） through branches，or how they change direction so quickly．He thinks that great steps could be made by studying wing aspect ratios-the ratio of wing length to wing width．Understanding these abilities and characteristics could be a benefit for robotics and will be the focus of future experiments．

33．What did the scientists find about hummingbirds？C
A．Their wings are long and wide．
B．They can hover in the air for a long time．
C．The ratio of their wing length to wing width is very important．
D．They are the most energetic flier in nature．
34．Which is the right order of Professor Lentink's research？D
①Tested wings from different species of hummingbirds．
②Got resources from museums．
③Analyzed the results and drew a conclusion．
④Tested the blades from a micro-helicopter．
A．①②③④
B．②①③④
C．②④①③
D．②①④③
35．According to Professor Lentink，what will be the focus of future experiments？D
A．To know how hummingbirds can fly in a strong wind．
B．To know how hummingbirds change direction so quickly．
C．To develop a new kind of helicopter．
D．To study the secrets of hummingbirds．

20．I haven't met him for ages，but his mothersees （see） him every day．

19．假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文．文中共有10处语言错误，每句中最多有两处．每处错误仅涉及一个单词的增加、删除或修改．
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词．
删除：把多余的词用斜线（\）划掉．
修改：在错的词下划一横线，并在该词下面写出修改后的词．
注意：
（1）每处错误及其修改均仅限一词；
（2）只允许修改10处，多者（从第11处起）不计分．
When my grandfather left school，he got his first job as a office worker．In those days，he was extreme thin．He paid very little，so he could not afford to eating a lot．I have one or two photos of her from that time，and he looks just like me，but a lot thin!When he grew older，he worked at all sorts of thing，such as reporting for a local newspaper and worked as a part-time salesman．He worked hardly all his life，but he always found out time for the things he enjoyed，like going fishing on weekends or reading books at home．

18．假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文．文中共有10处语言错误，每句中最多有两处．每处错误仅涉及一个单词的增加、删除或修改．
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词．
删除：把多余的词用斜线（\）划掉．
修改：在错的词下划一横线，并在该词下面写出修改后的词．
注意：（1）每处错误及其修改均限一词；
（2）只允许修改10处，多者（从第11处起）不计分．
Peer pressure is kind of pressure from people of your age，where is very common among young people．Because usually we just want to do the same things like other people of our age in order to be accepted by us．
Of course，sometimes peer pressure can be good．Meanwhile，in many cases，peer pressure had negative effects on us．When other student do something bad，such as smoking，drinking and say bad words，we tend to follow them．But that's complete wrong．
In the face of negative peer pressure，we should stick to that our independent mind．Just say No to bad behaviors!

17．Once there lived a rich man （61）who/that wanted to do something for the people of his town．（62）But first he wanted to find out whether they deserved his help．
In the centre of the main road into the town，he placed （63）avery large stone．Then he（64）hid（hide ） behind a tree and waited．Soon an old man came along with his cow．
"Who put this stone in the centre of the road？"said the old man，but he did not try to remove the stone．Instead，with some difficulty he passed around the stone and continued on his way．After a while （65）another man came along and did the same thing； then another came，and another．All of them complained about the stone but not tried to remove （66）it．Late in the afternoon a young man came along．He saw the stone，
（67）saying（say） to himself："The night （68）will be（be） very dark．Some neighbors will come along later in the dark and will fall against the stone．"
Then he began to move the stone．He pushed and pulled with all his （69）strength（strong） to move it．How great was his surprise at last!（70）Underthe stone，he found a bag of money．

16．The most important holiday in spring，especially for Christians，is Easter．This Christian holiday is not on the same date every year，but it‘s always on a Sunday．It can be any Sunday between March 22and April 25．Many people celebrate Easter by buying new clothes．Children celebrate by hunting for colored eggs that their parents have hidden around the house．People also give Easter baskets filled with candy and other goodies to one another to celebrate the day．
But the holiday is more than new clothes and good things to eat．On Easter，many people go to church to celebrate Jesus'resurrection （复活） from the dead．
Most people color them．Some people hide them．Others just eat them．But no matter what one does with Easter eggs，they are an important Easter tradition throughout the Western world．
People from many different cultures celebrate Easter．In both America and Belgium，children look for Easter eggs hidden on lawns and in bushes．In America，children believe the eggs are hidden by the Easter bunny．But in Belgium，the hidden eggs are supposed to have fallen from church bells．In Bulgaria，red Easter eggs are lucky in churches； Bulgarian families also hit these Easter eggs together to see whose is the strongest．The winner looks forward to good fortune that year．Still dozens of other Easter traditions exist．In parts of Austria，for example，children sing from door to door and are rewarded with colorful eggs．

28．To celebrate Easter，peopleD．
A．go shopping，hide colored eggs and children hunt for them
B．give Easter baskets filled candy and goodies to one another
C．buy new clothes，hide colored eggs and children look for themaround the house
D．both B and C
29．For Christians the more important thing to do on Easter isB．
A．buying new clothes
B．going to church to celebrate Jesus'resurrection
C．eating delicious food and paint color eggs
D．exchange beautiful gifts each other
30．People from different cultures have different ideas about Easter egg，B．
A．In both American and Belgium，children hunt for Easter eggs hidden in roomsand in bushes
B．In American，children believe the eggs are hidden by the Easter bunny
C．In Belgium，the hidden eggs are thought to have fallen from doorbells
D．In America，the hidden eggs are supposed to have fallen from doorbells
31．In some places of Austria，children sing from door to door forB．
A．Blesses
B．Easter eggs
C．candy and goodies
D．Easter bunny．

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