41. –Hi, Tom, You look tired.   --Yes, I _____________ the room all the afternoon.

A. painted      B. had painted     C. have painted     D. have been painting

42. –You have been to Africa? Could you tell me your experience there?

--____________I’ll do during the next break.

A. It just depends     B. By all means    C. No way     D. Go ahead

43. One of the sides of the board should be painted yellow and _____________.

A. the other is white       B. another white   C. the other white            D. another white

44. Dinosaurs have been extinct from the earth, never ____________ again.

A. seen         B. being seen        C. to be seen       D. having been seen

45. –Would you mind opening the window?    --___________.

A. Never mind    B. Yes, please     C. No, go ahead     D. Certainly not

46. The classroom is big enough __________, but we’ll have to move if we have more students.

A. for the moment    B. on the moment    C. in a moment    D. for a moment

47. Jack had traveled six miles across the channel ___________ his engine failed and was forced to land on the sea.  A. until            B. after              C. since          D. when

48. Xiamen is _____________ most beautiful city and we’ve decided to stay _________ fifth day.

A. a; a             B. a; the            C. the; a          D. the; the

49. I think _____________ dictionary is enough for us students.

A. such one        B. so a                C. one such        D. a so

50. They had a pleasant chat _____________ a cup of coffee.A. with   B. during      C. over       D. for