mik nhầm : sao lại là had been working ạ ?

câu 18,tại sao lại thành has been working vậy ạ?Mik kbt ý bạn

  chia theo thì quá khứ hoàn thành

1. When we came to the stadium, the match (already, begin).

 2. They told me they (not, eat) such kind of food before. 

3. He asked why we (come) so early. 

4. After they (go), I sat down and rested. 

5. Before she watched TV, she (do) her homework. 

6. It was the first time I (ever, see) such a beautiful girl. 

7. We (move) to BMT City by 1990. 

8. By the time we got there, the play (start) already. 

9. Before going to bed, the man (turn) off all the lights. 

10. A stranger (wait) for him when he came back home yesterday

Mik cần gấp

                     chia theo thì quá khứ hoàn thành

1. When we came to the stadium, the match (already, begin).

 2. They told me they (not, eat) such kind of food before. 

3. He asked why we (come) so early. 

4. After they (go), I sat down and rested. 

5. Before she watched TV, she (do) her homework. 

6. It was the first time I (ever, see) such a beautiful girl. 

7. We (move) to BMT City by 1990. 

8. By the time we got there, the play (start) already. 

9. Before going to bed, the man (turn) off all the lights. 

10. A stranger (wait) for him when he came back home yesterday