1.needn't
2.musn't
3.must
4.can
5.need
6.might
7.shouldn't / may
8.musn't
9.must
10.May
11.should not be given
12.may be presented
13.can be seen
14.should be made
15.can be observed
16.must be provided
17.may be asked
18.must be written
19.might be postponed
20.cannot be allowed
1.A
2.C
3.B
4.A
5.A
6.A
7.B
8.B
9.C
10.C
11.B
12.A
13.C
14.C
15.C
16.B
17.B
18.A
19.D
20.B
Ex1
6 might
7 shouldn't - may
8 mustn't
9 must
10 May
11 shouldn't be given
12 may be presented
13 can be seen
14 should be made
15 can be observed
16 should be provided
17 may be asked
18 must be written
19 might be postponed
20 should not be allowed
