16. If I __ that yesterday, I __ them. A. had discovered/would inform C. had discovered could inform B. had discovered/would have informed D. discovered/can inform 17. If you __ to the course regularly, they __ a certificate last year. A. go/gave C. had gone/ would have given B. gol give D. went/ would give 18. I think he is not at home.If he __ in,he __ the phone. A. was/answered B. were/ would answer C. were/ would have answered D. had been/ would have answered 19. If I __ in London now I could visit British Museum. A. were B. had been C. have been D. would be 20. If Columbus __ money from Queen Isabella, he __ across the AtlantiC. A. do not receive/could not sail B. had not received/might not have sailed C. did not receive/might not have sailed D. would not receive/might not sail 21. If you didn't wear shabby clothes, you __ more good-looking. A. will be B. would be C. would have been D. can be ? 22. If your hair __ grey now,what __ you __ ? A. went/ would/do B. goes/ would/do C. had gone/would/ do D. had gone/ would have/done 23. If you __ be someone,who __ you __ ? A. could/would/have been B. could/would/be C. can/will/be D. are able to/will/be 24. If I __ an Angel, I would try to make happy all the children. D. had been A. am B. have been C. were 25. John would be taking a great risk if he __ his money in that business. D. invests A. would invest B. invested C. had invested 26.It __ if nobody had reminded them. B. would have been forgot A. would have be forgot C. would have forget D. would have been forget 27. The car __ if somebody takes it there. A. will be repaired B.would be repaired C. will been repaired D is repair 28. You __ to prison if you did that. B. would have been sent A. would be send C. would be sent D. were sent 29. You would study Italian if it __ here. C. would be taught D. is taught A. was teaching B. were taught