71: The task is too much for me, so I can't carry on _____ any longer. I must get some help. A: alone B: simply C: singly D: lonely ...

65: Let’s go to the library this afternoon. A: That's a good idea. B: Yes, that's right. C: No. I can't. D: What about you? ...

60: I wonder if I could use your computer tonight. ______ I’m not using it right now. A: I don't know. B: It doesn't matter C: Sure, here you are. D: Who cares? ...

55: Encouragement is sometimes much more _____ than criticism. A: executive B: extensive C: effective D: efficient ...

50: Don’t worry me now, I will mend that coat _____. A: off and on B: back and forth C: now and then D: by and by ...

45: The novel I bought last week is worth ____, I think. A: being read B: to read C: reading D: to be read ...

40: _____ is often the case, we have worked out the production plan. A: When B: What C: As D: Which ...

35: Would you mind changing seats with me? A: Certainly, please do. B: No, I don't mind. C: Yes, you can . D: Of course, I like to . ...

29: Good-bye for now. ______. A: Long time no see. B: That's OK. C: The same to you. D: See you. ...

24: Thank you so much for your lovely gift.______. A: Never mind. B: Please don’t say so. C: I’m glad you like it. D: No, It’s not so good. ...