Câu trả lời:
6.a
7.a
8.d
9.b
10.c
11.d
12.a
13.b
14.d
15.a
Bài chọn lỗi sai
1.c =>which
2.c => stopped
3.a =>bored
4.b => most
5.b =>had stopped
6.c =>that
7.c => had known
8.a => hadn't been late
9.d => learned about
10.b => rỗng
11.b => would have come
12.a => would have gone
13.c => would have returned
14.c => knew