Exercise 4 : Choose the best answer A, B, C or D to complete the following sentences.
1. I will call Mono before I ________ in Thai Binh.
A. come B. will come C. will be coming D. came
2. After she graduates, she ________ a job.
A. got B. will get C. had got D. get
3. When I _________ him tomorrow, I will ask him.
A. saw B. have seen C. will see D. see
4. As soon as it _________ raining, we will leave.
A. stop B. stops C. had stopped D. stopped
5. Whenever I ________ her, I say hello.
A. will have seen B. will see C. see D. saw
6. The next time I go to New York, I am going ________ a ballet.
A. seeing B. see C. saw D. to see
7. By the time Bill __ to bed tomorrow, he will have had a full day and will be ready for sleep.
A. had gone B. will go C. goes D. went
8. As soon as I finish my report, I will call you and we ________ out for dinner.
A. went B. will go C. will have gone D. go
9. After he _______ breakfast tomorrow, he will get ready to go to work.
A. will have had B. have C. will be having D. has
10. As soon as he finishes dinner, he _______ the children for a work to a nearby playground.
A. will take B. takes C. will be taking D. took
11. When Bill gets home, his children ___________ in the yard.
A. played B. will play C. to playing D. play
12. He will work at his desk until he _____ to another meeting in the middle of the afternoon.
A. went B. go C. will go D. goes 
13. I will get home at 5:30. After I get home, I ________ dinner.
A. will have B. will be having C. had D. have
14 . As soon as the taxi _________, we will be able to leave for the airport.
A. arrive B. arrives C. will arrive D. arrived
15. I will go to bed after I _________my work.
A. will finish B. finished C. finish D. finishes