17. If you drove more slowly, you _____ so many accidents.

A. won’t have            B. wouldn’t have       C. would have            D. will have

18. If it is sunny, I _____ fishing. 

A. won’t go                B. don’t go                 C. will go                    D. go

19. If I came early, I _____ him.
 

A. could have met      B. could meet             C. couldn’t have met  D. meets

20. If he _____ to see me yesterday, I would take him to the movies.

A. came                      B. had come               C. comes         D. will come

21. If I _____ a typewriter, I could type it myself.
A. have                       B. had                         C. has                        D. am having

23. If he _____ harder, he can pass an exam.
A. has studied            B. have studied          C. study           D. studies

24. Tell him to ring me if you _____ him.
A. sees                        B. saw                    C. have seen        D. see

25. If I became very rich, I _____ the hospital for the poor.
 

A. will build               B. would build           C. build            D. won’t build