（10陕西）

21. I have to see the doctor because I       a lot lately.                     

软f585485b科9386限途b9b1学高广东件升的-根的慧技量优有8c0c元公19c204b5网司   A. have been coughing                  B. had coughed

  C. coughed                           D. cough

A.【解析】考查动词时态。由时间状语lately可知此处表示现阶段一直在进行的动作或存在的状态，且强调其持续性，用现在完成进行时，选A。

升的公19c204b5aec9科9386费学东bd9b限西9920学高件广be2f元89e9慧-根的优得软f585485b有8c0c司途b9b1量技量网

24. It is reported that many a new house     at present in the disaster area.           

  A. are being built    B. were being built  C. was being built    D. is being built

D.【解析】考查动词时态，语态及主谓一致。由时间状语at present可知此处动词表示的动作正在进行，主语与所填词是被动关系；many a+名词单数做主语时，谓语动词用单数形式，由此可知本题选D。