21. If it ___ rain, we ___ get wet. A. is to, should B. were to, would C. were going to, would D. was going to, should

20. He spoke in a quiet, distinct voice, as though his thought _____. A. was far away B. had been far away C. were far away D. went far away.

19. If only I _____ how to operate an electronic computer as you do. A. had known B. would know C. should know D. knew

18. It is required that you ____ at six. A. will arrive B. arrive C. arrived D. would arrive

17. If it ___ tomorrow, what would we do? A. rains B. were to rain C. would rain D. rain

16. If he had not gone out in the storm _____. A.he will be alive now B. he would be alive now C. he would have been alive now

15. The man insisted that he _____ there. A. should send B. would be sent C. sent D. be sent

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

13. How I wish I ____ to reapair the watch! I only made it worse. A. had tried B. hadn't tried C. have tried D. didn't try

12. Without electricity human life _____ quite different today. A. is B. will be C. would have been D. would be