16. I always (to air) my room in the morning.
a) airs c) will air
b) air d) aired
17. I (to be) very busy last summer and I (not to go) anywhere.
a) am, don’t go c) was, didn’t go
b) is, doesn’t go d) were, didn’t
18. Mike (to have) an exam tomorrow.
a) has c) had
b) will have d) have
19. My wife (to arrive) home two weeks ago.
a) arrives c) will arrive
b) arrived d) arrive