20 задание:
1.A
2.B
3.A
4.C
5.C
6.C
7.A
8.B
21 задание:
1.don't have to
2.should
3.may
4.might
5.wasn't able to
6.Would
15 задание:
1.didn't have to take
2.needn't have wait
3.didn't have to do
4.needn't have come
5.needn't have take out
6.didn't have to get
16 задание:
1.f
2.h
3.c
4.i
5.b
6.e
7.a
8.d
9.g
10.j
