题目列表(包括答案和解析)
用since或for填空:
I’ve been riding a bicycle ________ I was ten years old.
用since或for填空。
1.I've been playing the piano ________ 9:00.
2.Mary has been running ________ 20 minutes.
3.Sarah has been sleeping ________ 11:00.
4.Dave has been talking on the phone ________ five minutes.
5.Lucy has been studying Chinese ________ he was six years old.
用since或for填空:
Sam has been studying English ________ he was a very small child.
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