`19,` D

`20,` C

`21,` A

`22,` B

`23,` B

`24,` C

`25,` A

`26,` B

`27,` B

`28,` A

`29,` C

`30,` C

`---------------`

- S + have/has VpII + since + S + V2/ed + O

- Câu điều kiện loại 1: If + S + V-s/es, S + will + V-bare

- If not = Unless

- As soon as + S + V-s/es, S + will + V-bare

- When + S + V-s/es, S + will  +V-bare

- S + be/V + so + adj/adv + that  +S + V

Đáp án:

19.→ B. has 

     S + has/have + V-ed/3 

20.→C.  haven't heard

     S + has/have + not + V-ed/3

21.→ A .stop 

     Unless + S + V (htd), S + will + Vnt 

22.→B. will do

23.→ B .finishes

     S + will + Vnt  + as soon as + S + Vhtd 

24.→ C. arrive

         S + will + Vnt + as soon as + S + V (htd)

25.→ B .will be playing

      S + will be + V-ing hiện tại phân từ + when + S + V (htd)

26.→B could not 

27.→ B. returned 

     S + has/have + V-ed/3  + since + S + V qkd

28.→ A.will remind

      S + will + Vnt  + when + S + V (htd)

29.→ C. have you been/left

30. → D.lost/has been

       S + V-ed/3 qkd+ since then + S + has/have + been + V-ing hiện tại phân từ

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