Chọn đáp án đúng: If we took the 6:30 train, we______ too early

11.   If we took the 6:30 train, we______ too early.

        a. would have arrived b. will arrive                          c. arrived       d. would arrive

12.   If I had known you were in hospital, I ______ to see you.

        a. will go             b. would go       c. went                 d. would have gone

13.   If I______, I would have said hello.

        a. had seen          b. saw                 c. see                    d. would see

14.   If there______ the rice fields could have been more productive.

        a. had been enough water             b. were enough water

        c. would be enough water             d. are enough water

15.   The patient could not recover unless he ______ an operation.

        a. had undergone                           b. would undergo  c. underwent       d. undergoing

16.   If she______ him, she would be very happy.

        a. would meet     b. will meet       c. is meeting        d. should meet

17.   If he ______ a thorough knowledge of English, he could have applied for this post.

        a. had had            b. had                 c. has                   d. has had

18.   If I had enough money, I______ abroad to improve my English.

        a. will go             b. would go       c. should go        d. should have go to

19.   The bench would collapse if they______ on it.

        a. stood                b. stand              c. standing           d. stands

20.   ______ she agreed, you would have done it.

        a. If                      b. Had                c. Should             d. Would