---How long has the United Nations ________? --- ______1945.A．come into existenc
题型：不详难度：来源：
---How long has the United Nations ________?
--- ______1945.| A．come into existence; In | B．been in existence; Since | | C．been in existence; From | D．come into existence; For |
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答案
| B |
解析
| 这题考查动词的用法：因为和how long连用，要表示状态的动词be in existence，come into existence是短暂动词，不能和表示一段时间连用，第二空填since，可以和现在完成时连用。选B。 |
举一反三
--- Let me help you carry the heavy box?
--- _________! I’ m not that old.| A．Take your time | B．No way | C．Come on | D．Go ahead |
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--Do remember to charge the battery for 12 hours when you first use it.
--- ________.| A．Thank you, I remember. | B．What for? | | C．Up to you. | D．Got it. |
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---Excuse me, Sir, is the swimming pool open every day?
---______, only from 6:00 pm to 10:00 pm| A．That’s right | B．Yes, of course | C．Sorry, I’m not sure | D．Sorry, I’m afraid not |
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－Do you mind if I keep pets in this building ? －_____________________. | A．Of course not. It’s not allowed here | B． I’d rather you didn’t, actually. | | C．Great! I love pets | D．No, you can’t. |
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—— She will finish the project within three days!
—— ______! I could do it in three hours. | A．You are right | B．I’m stuck | C．Oh, come on | D．Don’t mention it |
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