1. 1- Had to
2-may
3-must
4-couldn't
5-should
6-needn't
7-was able to
2.
36- b
37-e
38-a
39-c
40-d
3.
1-f
2-t
3-f
4-t
5-t
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Answers & Comments
1. 1- Had to
2-may
3-must
4-couldn't
5-should
6-needn't
7-was able to
2.
36- b
37-e
38-a
39-c
40-d
3.
1-f
2-t
3-f
4-t
5-t