48. Mr Smith ____ a book about China last year but I don't know whether he has finished

　 it.

　 A. has written　 B. wrote　 C. had written　 D. was writing

47. I don't think John saw me. He ____ a book at that moment.

　 A. just read　 B. has just read　 C. was just reading　 D. had just read

46. ----Why didn't you go to the cinema yesterday?　 -----Because I ____ the film before.

　 A. had seen　 B. have seen　 C. have watched　 D. has watched

45. ----The train is leaving right now, but David hasn't arrived yet.

　 ----Well, he said he ____here on time.

　 A. came　 B. will be　 C. would come　 D. can be

44. ----Mum, may I go out to play football?

　 -----____you ____ your homework yet?

　 A. Have; finished　 B. Do; finished　 C. Are; finishing　 D. Did; finish

43. ----Tom, may I borrow your book Chicken Soup?　 ----Sorry, I ____ it to Mary.

　 A. lent　 B. have lent　 C. had lent　 D. lend

42. ----How do you like Beijing, Mr Smith?　 ----Oh, I ___ such a beautiful city before.

　 A. don't visit　 B. didn't visit　 C. haven't visited　 D. hadn't visited

41. ----____you ____ your e-mails today?

　 ----Not yet. There's something wrong with my computer.

　 A. Have; checked　 B. Did; check　 C. Do; check　 D. Are; checking

40. The Oriental Pearl TV Tower ____ thousands of visitors since 1995.

　 A. attracted　 B. attracts　 C. has attracted　　 D. will attract

39. ----I called you yesterday evening, but there was no answer.

　 ----Oh, I am sorry. I ____ dinner at my friend's home.

　 A. have　 B. had　 C. was having　 D. have had