I
a)1 D
2 B
b)
1 D
2 B
II
1 vonlunteer
2 magical
3 between
4 behide / between
5 to cook
6 didn't use to
7 learning
8 writing
III
1 education
2 fotunately
3 pleased
4 participating
IV
1 D --> to sign
2 B -->difficult
3 B --> use
4 B --> ought not to
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