1. we do not visit the museum because we have no time
A. If we have time, we will visit the museum B. if we had time, we would visit the museum
C. if we had time, we would have visited the museum D. if we had time, we will have visited the museum
2. ..........i have time, I will go with you
a. if B. unless C. so D. so that
3. If i .........who took your umberella, I would tell you
A. know B. knew C . known D. had know
4. If the automobile had not been in invented years ago,.......for basic transporttation now
a. what we would use b,what would we use c, what we will have used d, what we will be using
5, if the police had not saved me, i ..........at that time
a. will die b. would die c, will have died d, would have died
6. if i had time, i........and help you
a. will come b, would come c, will have come d, would have come
7, if I ......the truth, i would tell you
a, will know b, know c, hvae known d, knew
8, I'll return Bob' pen to him the next time if I .....him
a, will see b, see c, will have see d, have seen
9. I' d have told you if I .......the book
a, would have been b, should have seen c, had seen d,saw
10, If I..............more time , I would not have said such nonsense
a, am b, have been c, will be d,had been