题目内容：

April Fool's Day

April Fool's Day is a western festival. No one _______ exactly when and how April Fool's Day began. However, there are some stories about _______ it came into being. One story _______ like this: in the sixteenth­century France, the start of the new year was on April first. It was celebrated _______ much the same way _______ it is today with parties and dancing into the late hours of the night.

Then in 1562, Pope (教皇) Gregory introduced a new calendar for the Christian world, and the new year fell on January first. There were some people, _______, who hadn't heard or didn't believe the _______ in the date, so they _______ to celebrate New Year's Day on April first. _______ played tricks on them and called them “April fools”. They tried to make them believe that something false was ________. In France today, April first is called “April Fish”. French children fool their friends by taping a paper fish to their friends'________. When the “young fool” ________ this trick, the prankster (恶作剧者) shouts “April Fish！”

Today Americans play small tricks on friends and strangers alike on the first of April. One ________ trick on April Fool's Day is ________ down to a friend's shoe and saying, “Your shoelace is untied.” School children might tell a classmate that school has been canceled (取消). ________ the trick is, if you fail for the joke the prankster shouts “April Fool！”

In Britain today, on the first of April, even ________ newspapers, radio and TV programs tell big lies. You ________ read a science ________ showing that doctors have found a way to cure (治愈) AIDS, ________ you would probably listen to a piece of news about a UFO ________ on an island.

1.A. understands    B. knows    C. believes    D. remembers

2.A. when    B. why    C. how    D. where

3.A. goes    B. tells    C. happens    D. writes

4.A. as    B. like    C. with    D. in

5.A. like    B. as    C. so    D. for

6.A. however    B. but    C. therefore    D. instead

7.A. fact    B. news    C. change    D. information

8.A. remained    B. continued    C. considered    D. went

9.A. Others    B. Somebody    C. Many    D. Some

10.A. real    B. true    C. right    D. correct

11.A. hands    B. faces    C. backs    D. heads

12.A. discovers    B. sees    C. finds    D. notices

13.A. usual    B. common    C. funny    D. silly

14.A. putting    B. pointing    C. getting    D. turning

15.A. Whenever    B. Whoever    C. Whatever    D. Wherever

16.A. serious    B. famous    C. interesting    D. important

17.A. might    B. should    C. could    D. must

18.A. letter    B. speech    C. writing    D. report

19.A. so    B. and    C. or    D. but

20.A. lying    B. walking    C. flying    D. landing