阅读下面短文，掌握大意，然后请从A、B、C、D四个选项中选出最佳选项。

When are you an adult?

When do you think you are an adult? Maybe different     have different ideas.

Now let's see what some American teenagers say.

Sam: In    idea, you are an adult at the     of 18. That's when you can vote(投票）. You can help to   who rules the whole country. That's also a grown-up does! My grandfather couldn't vote    he was 21. They changed it to 18 in 1971.

Jenny: I don't     it's hard to say. I can drive a car at 16, can't I? When you have a driver's license, you can    it to people to tell them your age for all kinds of things.      sixteen must be the age when you change from a      person to an adult. Because you can tell others you are not a       any more.

Suzie: Well, I think there is    wrong with American laws for when young people can    things. I can vote at 18 and drive at 16. So you would think that 18 is a grown-up,     16 isn't. But then I can't drink wine until I'm 21! If I'm     an adult at 18, how can people stop me from      a cup of beer in a bar?

1.A. teenagers           B. adults                      C. drivers                    D. grandfathers

2.A. his                        B. my                            C. her                           D. your

3.A. age                       B. end                          C. front                        D. number

4.A. make     B. keep                         C. teach                       D. choose

5.A. after                     B. until                         C. when                       D. if

6.A. hope                    B. want                        C. like                           D. think

7.A. show           B. send                        C. ask                           D. pass

8.A. But                       B. And                         C. So                            D. Or

9.A. old                        B. young            C. little                         D. tall

10.A. baby            B. grown-up                 C. boy                          D. kid

11.A. anything            B. everything              C. something             D. nothing

12.A. do                      B. buy                          C. like                           D. borrow

13.A. as if                   B. even though C. ever since              D. above all

14.A. already             B. still                          C. also                          D. yet

15.A. selling                B. making                   C. drinking                  D. giving

What do we really mean by being open? Being open is a kind of invitation to others to come in, to speak and to share. It is important in letting others get to know how we think and feel. In this way we will be understood and accepted by others. If we aren’t open with others, we won’t fully believe in ourselves or others.
Here are a few ways for you to be more open. First, make your outside behavior the same with your inside feelings and thoughts. Second, share how you really feel about something instead of just opinions. Third, try to change your questions into statements(陈述句) and talk in the first person so that people will understand you more easily. For example, you might say, “I feel happy that you’re here,” instead of, “Are you glad that you’re here?” Finally, try not to say, “I don’t know.” This usually means I don’t want to think about it any more.
Remember also that it is not suitable to be open with everyone in every situation. You may want to be more open with close friends, but not with people you don’t know well, because you are not sure how someone else will use what they know about you. Besides, some people may not be used to too much openness. If we say everything we feel or think to them, they will feel very uncomfortable at times.
In all, being open is a good way for us to get on well with other people, but we’d better keep the balance between being open and not being too open.

Cats are the most popular pets among Americans. So it is not surprising that there are a lot of expressions about cats. Some cats like to catch small birds, like canaries (金丝雀). If someone looks very proud and satisfied with himself, we say “he looks like the cat that ate the canary.”
Sometimes, a cat likes to play with a small animal it catches. So if you “play cat and mouse” with someone, it means that you change between different kinds of behavior when dealing with another person. For example, a girl might offer something sweet to her little brother and then take it away when he reaches for it.
Americans might say that something is “the cat’s miaow” or “the cat’s pajamas(睡衣)” to describe something that is the best or finest. “A copycat” is someone who acts just like someone else or copies another person’s work. “A fat cat” is a person with a lot of money.
If you tell about something that is supposed to be a secret, we say you “let the cat out of the bag”. If you are not able to speak or answer a question, someone might ask you if “the cat has got your tongue(舌头)”
Have you ever watched children in a classroom when their teacher leaves for a few minutes? “When the cat’s away, the mice will play” means people sometimes act badly when there is no supervision (监管).
You may have heard the expression “curiosity killed the cat”. This means caring too much about things that are not your business might cause problems.
If you have ever had cats as pets, you know it is difficult to train them or to get them to do something. Cats are not like Sheep or cows that can be moved in a group. So we say a difficult or impossible job is like “herding (放牧) cats “
【小题1】What can we learn from the passage?

When are you an adult (成年人)？

When do you think you are an adult ? Maybe different __31_ have different ideas.

Now let’s see what some American teenagers(青少年)say .

Sam: In  32 idea ,you are an adult at the  33  of 18. That’s when you can vote(投票)。You can help to   34  who rules(统治)the whole country .That’s also a grown-up does! My grandfather couldn’ t vote   35 he was 21.They changed（改变） it to 18 in 1971.

Jenny：I don’t 36  it’s hard to say . I can drive a car at 16, can’t I ?When you have a driver’s licence , you can 37 it to people to tell them your age for all kinds of things .  38    sixteen must be the age when you change from a  39  person to an adult.Because you can tell others you are not a  40   any more .

Suzie : Well , I think there is  41   wrong with American laws for when young people can  42  things . I can vote at 18 and drive at 16. So you would think 18 is a grown-up,  43  16 isn’t .But then I can’t drink wine（酒）until I’m 21 ! If I’m 44   an adult at 18, how can people stop me from  45   a cup of beer in a bar ?

3..

13.A,as if           B.even though    C.ever since    D.above all