<span>1.
Sir, don't you know that when flying you (must) show you
passport.
2. I (must) be at the meeting at 6 p.m. so I can't join
you for dinner.
3. There are many guests in the house, George will (have
to) sleep on the sofa
4. People (must) realize there are
limits to what we can do.</span>
I. 1) will, be
2) are
3) was
4) did, was
5) is
6) was, was
7) will be
8) am, am
9) is
10) did, was
II. 1) She will not be at home tomorrow.
2) My friend is ill
3) I was a student in last year.
III. 1) It not often snows in winter, Is it often snows in winter?
2) We didn`t spend our holidays in the country last summer, Did we spend our holidays in the country last summer?
3) She will not study in London, Will she study in London?
IV. 1) worked
2) will go
3) did not watch
4) wrote
5) bought
6) did not buy
7) go
8) will go
9) cooked
10) wash
7)Are they playing in the room now?
8)He helps him mother everyday.
9)Does he help him mother everyday?
10)I dont read books in the morning.
11)Do you go to school on Sunday?
12)My father doesn't work on Sunday.
13)He works everyday.
14)Is he sleeping now?
15)We don't go to the contry in winter.
16)My sister eats sweets every day.
17)She isn't eating sweets now.
18)They don't do their homework in the afternoon.
19)They don't go for a walk in the evening.
20)My friends don't like to play football.
Bill worn his green jacket yesterday.
Did he wear his...
Bill didn't wear his...