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单项选择 1. —I’m sorry, but the manager isn’t here yet. Shall I have him call you when he comes back? —No, I’ll call him later. If I call again in half an hour, do you think he ______? A. arrives B. has arrived C. will arrive D. will have arrived 2. Tell John not to leave the house unless he ______ that the lights ______. A. will make sure; turn off B. makes sure; are turned off C. will make sure; will turn off D. makes sure; will be turned off 3. —Is there any possible way to help the children get rid of such a bad habit? ?To be honest, it’s very hard, but we ______ on this problem. A. work B. worked C. are working D. were working 4. —I hear you ______ at Smith’s. ?Yes, I ______ there for about three months. A. work; had been working B. worked; was working C. are working; have been working D. worked; have worked E. 5. You really need to go out and get some fresh air and sunshine. You ______ overworking during the last two weeks. A. have been B. were C. had been | 
