I have been skating _______ nine o’clock.
题型：不详难度：来源：
| I have been skating _______ nine o’clock. |
答案
| B |
解析
| 考查现在完成时。Since和for都可和现在完成时连用。但是，since后加时间点，而for后加时间段，9点是时间点，故用since。句意“我从9点开始，就一直在滑冰了。”故选B。 |
举一反三
--- Lily isn’t here today, What’s happened to her?
---She stays at home her illness.| A．because | B．because of | C．so | D．so that |
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一Have you read today’s morning paper?
－Not _______. What’s the latest news? |
| I haven’t gone back to my hometown _______I left it in 1993. |
_ Lily _ Lucy is going with you because one of them must slay at home.| A．Not only；but also | B．Neither; nor | | C．Both;and | D．Either;or |
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--Is my answer to the math problem fight?
---Let me consider it carefully I give you an answer.| A．before | B．after | C．since | D．as soon as |
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