1b 

-> ta có cấu trúc : thì hiện tại hoàn thành + since + thì QKĐ 

2b 

-> Trong câu gián tiếp thêm “if” hoặc “whether” và mệnh đề theo sau biến đổi về dạng

3A

-> thì QKTD 

4c

-> ta có cấu trúc câu hỏi dán tiếp : 

-> s +asked + somebody + wh question + s + v nguyên mẫu 

5 c

-> đây là câu gián típ ở thì QKHT 

6 D

-> quy tắc lùi thì của câu gián tiếp 

7 d

8 c

-> thì TLĐ 

9 A

-> he là ngôi thứ 3 số ít nên s + vs /es 

10 a

-> ta có cấu trúc câu hỏi gián típ : 

-> s +asked + somebody + wh question + s + v nguyên mẫu 

11 b 

12 c 

-> thì TLĐ 

13 a

-> câu trúc câu hỏi câu gián típ 

14 c

-> Mệnh đề thứ nhất là câu gián tiếp của câu hỏi đảo nên sử dụng động từ để xuôi sau if hoặc whether 

15 d

-> Đây là câu tường thuật, không phải câu hỏi nên không thể đảo trợ động từ lên trước.

16b

1. John said he ………………. her since they ………………. school.
     A. hasn't met - left          B. hadn’t met - had left
     C. hadn’t met – left         D. didn't meet - has left
2. The woman asked ………………. get lunch at school. 
     A. can the children          B. whether the children could
     C. if the children can         D. could the children
3. Laura said that when she ………………. to school, she saw an accident.
     A. was walking         B. has walked
     C. had been walking         D. has been walking
4. He asked, "Why didn’t she take the final exam?" - He asked why ………… the final exam.
     A. she took       B. did she take        C. she hadn’t taken         D. she had taken
5. Ba said he ………………. some good marks the semester before.
     A. gets  B. got        C. had gotten D. have got
6. They told their parents that they ………………. their best to do the test.
     A. try  B. will try       C. are trying  D. would try
7. She asked me where I ………………. from.
     A. come  B. coming       C. to come  D. came
8. He wants to know whether I ………………. back the following day    
     A. come  B. came       C. will come  D. would come
9. I wonder why he ………………. love his family.
     A. doesn't  B. don’t       C. didn’t   D. hasn't
10. They asked me how many children ………………. 
     A. if I had  B. had I        C. I had  D. have had
11. Thu said she had been ………………. the day before.
     A. here                   B. there                    C. in this place         D. where
12. The student said that the English test  the ………………. most difficult.
     A. is   B. was        C. will be  D. have been
13. He wanted to know ………………. shopping during the previous morning.
     A. if we had been going        B. that if we had been going
     C. we were going         D. that we were going
14. He asked me ………………. Robert and I said I did not know 
     A. that did 1 know - who were he. B. that I knew - who he had been.
     C. if I knew - who he was.  D. whether I knew - who had he been.
15. The mother asked her son ………………. 
     A. where he has been.        B. whether I had been.
     C. where has he been.        D. where he had been.
16. She asked me ………………. my holidays ………………. 
     A. where I spent - the previous year. 
     B. where I had spent - the previous year,
     C. where I spent - last year. 
     D. where did I spend - last year.