21. In ______ eyes of my parents, a knowledge of English is ______ must in the world today.
A. the;不填 B. the; a C.不填; a D.不填;不填
22. Different from girls, boys are likely to be ______ about sharing their feelings with their close friends.
A. cautious B. positive C. curious D. enthusiastic
23. It is reported that China will not buy the Euro debt until some thorough research ______.
A. will be done B. had been done
C. has been done D. will have been done
24. — Have you got any information about your missing dog from the police?
— No. I ______. The police say they’ll let me know when there is any news.
A. waited B. was waiting C. have waited D. am waiting
