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Kun Ken
Đỗ Thanh Hải
9 tháng 9 2021 lúc 18:42

1 has been preparing

2 have been walking - haven't arrived

3 has been cleaning - has cleaned

4 has been teaching - has never had

5 has been snowing - have never seen

6 has been looking - has finally found

7 has been teaching 

8 Have you finished

9 has been writing - has already written

1 D

2 C

3 C

4 B

5 C

 


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