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用for 或 since完成下列句子

1. She has been there ________ three days.

2. Jack has been here ________ Tuesday.

3. It has been raining ________ an hour.

4. I've known Sue ________ two years ago.

5. I have had this camera ________ 1989.

6. Liz has been studying medicine at university ________ three years.

7. Dave has been started playing the piano ________ he was seven years old.

 

答案：1. for 2. since 3. for 4. since 5. since 6. for 7. since
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用for或since完成下面句子。

例：Jill is in Ireland now．She arrived there three days ago．

She has been there for three days．

Liz is studying medicine at university．She started three years ago．

________________

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用 for  或 since填空。
1. He's been waiting for you ______ two hours.
2. John has been living here ______ 2008.
3. I've been staying in London ______two weeks.
4. Jack has been studying French ______ he was mine.
5. I slept only ______ two hours last night. Now I feel very tired.

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