Choose the best answers to complete the sentences. (7 pts)

17. I asked her _________ she understood the lesson.

A. that                B. if                   C. when                       D. what

18. My parents would not be so upset if I _________ harder.

A. is working      B. will work       C. worked                     D. works

19. If my parents had more money, they _________ a bigger house.

A. wil buy          B. would buy     C. bought                      D. were buying

20. If my grandfather _________ ten years younger, he would do yoga every day.

A. are                B. am                C. have been                 D. were

21. My friends promised that they would come to my birthday party _________.

A. tomorrow      B. yesterday       C. the previous day      D. the following day

22. I wish I _________ enough money to travel to New York now.

A. had               B. had had         C. have                          D. will have

23. If you _________ your best, you'll achieve your goal.

A. tried              B. have tried      C. are trying                   D. try