题目：

31. Father went to his doctor for ____about his heart trouble.
    A.     an advice   B. advice   C. advices   D. the advices

32. All but one ____here just now.
    A.     is     B. was            C. has been   D. were 

33. The number of people invited _____fifty， but a number of them _____absent for different reasons.
    A.     were； was      B. was； was 
    C. was； were  D. were； were

34. The air in big cities _____very dirty by factories.
    A.     are often made        B. is often made
    C. have often made       D. has often made

35. Nobody ____to smoke in the cinema.
    A.     allows    B. allow    C. is allowed    D. are allowed

36. The Chinese people _____hard-working and brave.
    A.     are    B. is    C. has been   D. are being

37. ____can be done _____been done.
    A.     All； have   B. All that； have 
    C. All； has  D. All that； has

38. John has two brothers， but either ____out of work now.
   A.     are        B. is        C. has        D. have

39. The police ____the murderer everywhere when he suddenly appeared in a theatre.
    A.     is searching for      B. were searching for
    C. are searching for     D. were searching

40. Apples of this kind ____.
    A.     tastes good  B. tastes well  
    C. taste good    D. taste well

【答案解析】

  31-35 BDCBC   36-40 ADBBC