help m,ik câu 4 đến 15 vs ạ
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I have
4. She has taught the children in this remote village for five months.
She started
5. He hasn't written to me since April.
The last time
6. She hasn't had a swim for five years.
She last
7. They last talked to each other two months ago.
They haven't
8. The last time she saw her elder sister was in 1999.
She hasn't
9. She hasn't written to me for years.
It's years
10.Robert and Catherine have been married for ten years.
It's ten years
11. It's two weeks since they cleaned their room
They
12.It's over six months since John had his hair cut.
John
13. How long is it since you rode a bicyde?
When
14. How long is it since he wrote to you?
When
15. When did he last talk to you?
How long