21.A:What does your mother do? B:( ).
A. She does shopping once a week
B. She tells stories to my daughter every evening
C. She is a clerk in a bank22.A:Are there two men in the room? B:( )__.
A. No, there are one B. No, there's only one
C. Yes, there is one 23.I just ( ) at the office for most of the day, and I do no exercise. A. sit around
B. sit in C. sit down
24.A:( ) you like a drink? Wine? Beer? B:A beer, please.A. Could
B. Would
C. Do
25.A: I saw Tom just now at the café B:It ( )be him. He went to U.S.A. yesterday.
A. mustn't
B. can't
C. shouldn't
21C what does sb do是固定句式，询问某人的职业，据此即可选C22A 句意为“屋子里是有两个人吗？不，只有一个”B中only赘述，只能选A23C词义辨析sit around为闲坐，无所事事，sit in为列席，旁听，只能选C，另外sit down为固定搭配，后面的介词at与office连用，表位置24B Would you like sth/to do sth/doing sth ?是固定句式25B意为“不可能是他，他昨天去美国了。”mustn't为禁止，不允许的意思，shouldn't语气则没有can't那么强烈
21.A:What does your mother do? B:(c ).A. She does shopping once a week
B. She tells stories to my daughter every evening
C. She is a clerk in a bank22.A:Are the
