I
1 B surface
2 A wanted
3 D laugh
4 B always
5 B knife
6 D humor
7 D report
8 C group
9 B revise
10 D safety
II
1 A themselves
2 B old enough to
3 C ought
4 B on
5 B hard
6 C playing
7 B to take
8 B to give
9 D. A and B
10 B to leave
III
1 He is intelligent enough to answer all the questions.
2 He isn't tall enough to reach the shelf.
3 She is good enough to pass the exam.
4 You aren't well enough to go to school.
5 They are sociable enough to make a lot of friends.
IV
1 B to -> from ( different from: khác với )
2 C good -> well ( sau động từ speak cần trạng từ )
3 B reported -> report ( didn't + Vinf )
4 C for -> since ( last Sunday là mốc thời gian nên dùng " since " )
5 B went -> gone ( S+ have/ has + Vpp )
6 B staying -> stay ( ought to + Vinf )
7 B smoking -> smoke ( used to + Vinf )
8 C keep -> to keep ( ask someone + to V )
9 B differently -> different
10 C do -> doing ( interested in + Ving )
