6. Would you mind ____ the computer game in your room? A. him playing B. his playing C. him to play D. him play ...

12. Anna was reading a piece of science fiction, completely ___ to the outside world. A. having been lost B. to be lost C. losing D. lost ...

14. He demanded that the laboratory report ___ immediately after the experiment was done. A. was written B. be written C. must be written D. would be ...

8. Something must have happened on their way here. Or they _________by now. A. should have arrived B. should arrive C. would have arrived D. would arrive ...

7. John, ______the bet, had to pay for the dinner. A. lost B. having lost C. losing D. having loss ...

23. Last night we went to a big party．The dinner and speeches _____ more than three hours. A. took B. spent C. used D. occupied ...

15. If you decrease the_____of alcohol in this solution, it would be less dangerous. A. part B. portion C. section D. share ...

8. We waited more than half an hour for Beth but _____ we had to leave without her. A. at last B. afterward C. eventually D. willingly ...

2. By law, when one makes a large purchase, he should have ___ opportunity to change his mind. A. accurate B. urgent C. excessive D. adequate ...

22. Robots have already_____ human tasks in the industrial field. A. taken on B. taken out C. taken up D. taken over ...