Câu 9 bạn bỏ never vs here đi nha
câu 10 đổi 6o'clock ago => at 6 o'clock
11 I have not gone to the zoo for 10 years
12 Minh has not gone to the zoo before
14 They have not seen him since Monday
15 thiếu tobe nha
17 The bus was stopped by us to wait the man
18 The present has been opened excitedly by the little girl
19 He used to be taken to school by motorbike by his father
20 shown chứ kp show
Đúng 3
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