16. I’ll stay till the wind ... .
a) change; b) changes; c) will change; d) shall change.
17. I think the letter ... on Monday.
a) will receive; b) was receive; c) is receive; d) will be received.
18. You ... smoke here. It’s forbidden.
a) don’t have to; b) mustn’t; c) needn’t;
19. Sam doesn’t work hard, ... ?
a) is he; b) isn’t he; c) does he;
20. We visited her ... uncle in hospital.
a) thick; b) seak; c) sick;