1C
2A
3A
4A
5B
6C
7B
8B
9A
10B
11A (Wear → Wearing)
12B (looking → looked)
13C (leave → leaving)
14B (for → to)
15. She wishes she could play guitar well.
16. He enjoys walking in the rain.
17. I used to cry a lot when I was a child.
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Chúc em học tốt.