第二部分：英语知识运用（共两节，满分45分）
第一节：单项填空（共15小题；每小题1分，满分15分。）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21.In the United States, there is always ____ flow of people to areas of ____ country where more jobs can be found.
A. a; the B. the; a C. the; the D. a; a
22.Although he is a teenager, Fred could resist ____ what to do and what not to do.
A. telling B. Being told C. to tell D. to be told
23.The policeman’s attention was suddenly caught by a small box which ____ placed under the Minister’s car.
A. has been B. was being C. had been D. would be
