If the light from the sun so bright, the stars in the sky all day. [ ] A. were not; would be seen B. is not; would have seen C. are not; would have been seen D. would not be; have been seen 题目和参考答案——青夏教育精英家教网—

题目内容

If the light from the sun ________ so bright, the stars ________ in the sky all day.

[　　]

A. were not; would be seen

B. is not; would have seen

C. are not; would have been seen

D. would not be; have been seen

答案：A
提示：

虚拟语气在条件状语从句中的用法.表示与将来事实可能相反的假设，条件句可用①动词的过去式；②should ＋动词原形；③were to ＋动词原形；主句可用would/should／could／might ＋动词原形.该句表示的就是与将来事实相反的假设，条件句用上述③种形式，主句谓语用would，主句主语是谓语动词动作的承受者应用被动语态.

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阅读下列短文, 从所给的四个选项中, 选出最佳答案。

If you can find a tree which has been cut down, you will see many　　 rings, or circles on the base of the trunk. By learning to read these　　 rings, you can find out about the tree's life.

The number of rings tells you how old the tree is. Each year, new　　 wood is formed on the outside of the tree. This new wood is light in　　 color when the tree is growing in spring and summer, and dark in　　 winter when the tree is not growing much. So, if you count the rings　　 of dark-or-light-colored wood, you can often find out how old the　　 tree is.

You can also tell which years have been good years and which years　　 have been bad years. When the light-colored rings are very wide, it　　 means that the tree has been growing quickly that year. If the light　　 rings are narrow, it has been growing slowly. If the rings on a tree　　 trunk were greatly magnified (放大), you would be able to see why the　　 rings are light-colored when the tree is growing quickly, and　　 dark-colored when the tree is growing slowly. The tree trunk is made　　 up of microscopic tubes (毛细管), like some pipes, carrying water from　　 the soil, through the trunk, and up to the leaves. They are wide and　　 thin-walled when the tree is growing quickly and they are carrying a　　 lot of water. They are narrow and stuck together when the tree is not　　 growing so quickly.

When a tree is old, the tubes in the center of the tree don't　　 carry water. The walls of the tubes have become thick with materials　　 which have stuck along them over the years, forming a kind of wood　　 called "heartwood". This kind of wood is darker in color than the　　 young, growing wood on the outside of the tree.

You don't very often see whole tree trunks which have been cut　　 across. But once you learn to read a cross section (横截面) of the　　 wood, you can see much more in wood which has been used to make boxes,　　 houses, and other things.

In most wood, instead of seeing the trunk cut across, you are　　 seeing it cut along its length. Because you don't see the whole tree,　　 you can't tell how old it is.

(1) The writer says you can tell the age of a tree by _______.

[ ]

A. the number of rings in its trunk

B. the size of the base of its trunk

C. the color of its rings

D. the rings on the outside of the tree

(2) When wood of a tree is mostly light in color, this means that the tree _______.

[ ]

A. grew slowly

B. grew quickly

C. only grew in winter D. only grew in summer 　　

(3) If all the rings in the cross section of a tree trunk are wide and about the same width, then we can tell that the tree _____.

[ ]

A. grew quickly all its life

B. grew slowly all its life

C. grew quickly when it was young and more slowly later

D. grew slowly when it was young and more quickly later 　　

(4) In a certain country, it is usually dry and rains heavily every three years. Which drawing given below shows a tree trunk from this country?

[ ]

阅读下面短文，从每题所给的四个选项中选出最佳答案.

　　If you can find a tree which has been cut down, you will see many rings, or circles, on the base of the trunk（树干基部）. By learning to read these rings you can find out the tree's life.

　　The number of rings tells you how old the tree is. Each year, new wood is formed on the outside of the tree. This new wood is light in colour when the tree is growing in spring and summer, and dark in winter when the tree is not growing much. So, if you count the rings in dark-or-light-coloured wood, you can often find out how old the tree is.

　　You can also tell which years have been good years and which years have been bad years. When the light-coloured rings are very wide, it means that the tree has been growing quickly that year. If the light rings are narrow, it has been growing slowly. If the rings on a tree trunk were greatly magnified（放大）, you would be able to see why the rings are light-coloured when the tree is growing quickly, and dark-coloured when the tree is growing slowly. The tree trunk is made up microscopic tubes（毛细管）, like long pipes, carrying water from the soil, through the trunk, and up to the leaves. They are wide and thin-walled when the tree is growing quickly and they are carrying a lot of water. They are narrow and stuck together when the tree is not growing so quickly.

　　When a tree is old, the tubes in the centre of the tree don't carry water. The walls of the tubes have become thick with materials which have stuck along them over the years, forming a kind of wood called “heartwood”. This kind of wood is darker in colour than the young, growing wood on the outside of the tree.

　　You don't very often see whole tree trucks which have been cut across. But once you learn to read a cross section（横断面）of the wood, you can see much more in wood which had been used to make boxes, houses, and other things.

　　In most wood, instead of seeing the trunk cut across, you are seeing it cut along its length. Because you don't see the whole tree, you can't tell how old it was.

（1）The writer says you can tell the age of a tree by ________.

[　　]

A. the number of rings in its trunk

B. the size of the base of its trunk

C. the colour of its rings

D. the rings on the outside of the tree

（2）When the wood of a tree is mostly light in colour this means that the tree ______.

[　　]

A. grew slowly

B. grew quickly

C. only grew in winter

D. only grew in summer

（2）Heart wood is wood which is ________.

[　　]

A. old and darker in colour

B. fast-growing

C. younger and lighter in colour

D. slow-growing

（3）If all the rings in the cross section of a tree trunk are wide and about the same width, then we can tell that the tree ________.

[　　]

A. grew quickly all its life

B. grew slowly all its life

C. grew quickly when it was young and more slowly later.

D. grew slowly when it was young and more quickly later

（4）In a certain country, it is usually dry and rains heavily every third year. Which drawing given below shows a tree trunk from this country?

[　　]

A. grew quickly all its life

B. grew slowly all its life

C. grew quickly when it was young and more slowly later

D. grew slowly when it was young and more quickly later

（5）In a certain country, it is usually dry and rains heavily every third year. Which drawing given below shows a tree trunk from this country?

[　　]

If you will be cycling, you will need to know what these traffic signs and signals mean.

A sign like this one means that there is a bike lane. If there is a bike lane, you are required to use it. If there is not a bike lane, you should ride with traffic as far to the right side of the road as possible.
When the signal light turns green, cars go. When you cross the street at a signal light, you should wait for the walk signal. Be sure to look carefully to the left, right and left again, before crossing the street.
When the signal light turns yellow, car drivers should slow down and prepare to stop. You should not cross if the light is yellow. The light is about to turn red, and cars will enter the intersection.
This signal is the WALK sign. It has a picture of a person walking instead of using the word WALK.
This signal is the DON'T WALK sign. It is part of the signal with the picture of a person walking.This is a picture of a red hand, meaning you should stop. You should wait to cross the street until the green picture of the person walking is showing.
Car drivers and bikers must come to a complete stop at STOP signs.
A yield sign means to slow down and be ready to stop.
If there are pedestrians(行人)or vehicles in or nearing the intersection，you must stop.
If there is no traffic in or nearing the intersection and it is safe，you may go through.
This sign means you are coming to a crosswalk. Car drivers, antibikers must stop to allow people in the crosswalk to cross the street.
When people are working on the roads, parts of the road are often dug up or rough. Be careful when cycling. Rough roads could make you fall off your bike. If you must move into the road to go around a work area, you should stop and look carefully to be sure there is no traffic coming before going into the road.
A detour is a way of getting around a roadway that is closed. Roads are usually closed because of road work or dangerous conditions. If you must take a detour, be careful of roads you aren't used to.
【小题1】The passage is intended for ________.

【小题2】If you see the sign

while riding a bike，you are required to ________.

A．take the bike lane	B．stop your bike
C．ride close to the right side of the road	D．ride in the middle of the road

【小题3】Cyclists may see the sign when ________.

A．they come near a crosswalk

B．the bad weather is on the corner

C．they are about to pass a school

D．the road ahead is blocked because of the landslide (山崩)

If you will be cycling, you will need to know what these traffic signs and signals mean.

A sign like this one means that there is a bike lane. If there is a bike lane, you are required to use it. If there is not a bike lane, you should ride with traffic as far to the right side of the road as possible.

When the signal light turns green, cars go. When you cross the street at a signal light, you should wait for the walk signal. Be sure to look carefully to the left, right and left again, before crossing the street.

When the signal light turns yellow, car drivers should slow down and prepare to stop. You should not cross if the light is yellow. The light is about to turn red, and cars will enter the intersection.

This signal is the WALK sign. It has a picture of a person walking instead of using the word WALK.

This signal is the DON'T WALK sign. It is part of the signal with the picture of a person walking.This is a picture of a red hand, meaning you should stop. You should wait to cross the street until the green picture of the person walking is showing.

Car drivers and bikers must come to a complete stop at STOP signs.

A yield sign means to slow down and be ready to stop.

If there are pedestrians(行人)or vehicles in or nearing the intersection，you must stop.

If there is no traffic in or nearing the intersection and it is safe，you may go through.

This sign means you are coming to a crosswalk. Car drivers, antibikers must stop to allow people in the crosswalk to cross the street.

When people are working on the roads, parts of the road are often dug up or rough. Be careful when cycling. Rough roads could make you fall off your bike. If you must move into the road to go around a work area, you should stop and look carefully to be sure there is no traffic coming before going into the road.

A detour is a way of getting around a roadway that is closed. Roads are usually closed because of road work or dangerous conditions. If you must take a detour, be careful of roads you aren't used to.

1.The passage is intended for ________.

A. car drivers B. skaters C. bikers D. Pedestrians

2. If you see the signwhile riding a bike，you are required to ________.

A. take the bike lane B. stop your bike

C. ride close to the right side of the road D. ride in the middle of the road

3.Cyclists may see the sign when ________.

A. they come near a crosswalk

B. the bad weather is on the corner

C. they are about to pass a school

D. the road ahead is blocked because of the landslide (山崩)

Direct ions: Complete the following passage by filling in each blank with the word that best fits the context．

China's revised traffic regulations have stirred up controversy since it took effect on January 1st. They are believed to be the most stringent(严厉的) traffic regulations in the country.

    According to the new rules, 52 different kinds of violations can result   48 penalties, up    49 38 under the previous regulation. And the new rule also doubled penalties 50 drivers face. In addition, drivers counterfeiting(伪造) the motor vehicle plates（车牌） 51 not installing one properly will have 12 points deducted immediately from the previous 6 points.
    Many drivers say the punishment is quite heavy and they need to be more careful than before.
    "If I run a red light twice, I will have to retake the traffic training course. I am very busy. I could lose my job for this. I can't afford to take the risk." some complain. But   52 voiced their worry about the yellow light rule. "I don't know whether I can stop if the light suddenly turns yellow. Plus, I think it will be better 53 the traffic lights are installed with countdown meters. If I know how much time is left I can decide whether 54   stop or not."

The new rule also stipulates(规定) that drivers with less than one year's driving experience cannot drive on expressways 55 .

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