11. Mo and Nguyen (sing) are singing the same song now.
12. They always (make) make noise in the class.
13. He (not study) isn't studying Math at the moment.
14. I (just/ see) have just seen Andrew and he says he has already (do) done about half of the plan.
15. I have .just (decide) decided to start working next week.
16. He (be) has been at his computer for seven hours.
17. She (not/ have) hassn't had any fun for a long time.
18. At the moment, the children. are playing (play) soccer in the garden.
19. She will go (go) camping tomorrow.
20. I can speak (speak) English.
21. She will visit (visit) her aunt next week.
22. Have they (pay) paid money for your mother yet?
23. My wife and I (travel) travelled to Mexico by air last summer
24. I (read) have read that novel by Hemingway sevaral times before.
25. I (have) had a little trouble with my car last week.
26. If I don't have (not /have) lunch, I will be (be) hungry.
27. If he isn't (not /be) at work, he will be (be) at home then.
28. If I don't work (not/work), I will go (go) to a disco.
29. If Oanh isn't (not/ be) thirsty, she won't drink (not/drink) any fizzy mineral water.
30. If she doesn't get (not/ get) tired, I will invite ( invite) her to our party