Question

Answer 1

1 knew => know 

2 has => have 

3 have seen => saw 

4 don't => doesn't 

5 for => since 

6 was => were 

7 goes => go 

Bài 2 

1 C

2 B

3 A

4 B

5 B

6 B

7 C

8 B

9 B

10 B

Answer 2

1.knew => know 

2. has => have 

3. have seen => saw hoặc 3 months ago => for 3 months 

4.don't => doesn't 

5.for => since 

6.was=> were 

7.goes => go