Question

giúp mình làm bài này với ạ.

 

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Answer 1

1. since - for.

2. for - since.

3. when - since.

4. since - for.

5. for - since.

6. is - was.

7. when - since.

8. have done - did you do.

9. has started - started.

10. However - bỏ do ko hợp lệ.

11. while - since.

12. to have - having.