Jack has been skating four hours ago .A since B. about C.for ab
题型：不详难度：来源：
Jack has been skating four hours ago .
A since B. about C.for about D. in |
答案
| A |
解析
| 在完成时中常用for和since引导时间状语。Since+点时间，for+段时间。 |
举一反三
Look, The boys and girls over there.| A．play games | B．playing games | C．are playing games | D．plays games |
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I a new song last month.| A．write | B．writes | C．wrote | D．to write |
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— Where you last Monday?
—I went to the library.| A．do, go | B．did, go | C．does, go | D．did, went |
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—What Jim last weekend?
—He did his homework.| A．do, did | B．did, do | C．did, did | D．do, do |
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—How his weekend?
—Not too bad. He stayed at home and watched TV. |
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