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Some experts recommend signs and posters be put up in areas _________(不允许抽烟的地方)．(allow)

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If it had not been for your help, _________(我们不会生活幸福)now．(live)

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_________(是我莫大的荣幸)to have been invited to speak at the coming 100th anniversary of our univerity．(honour)

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The press conference, originally _________(将在明天举行), has to be put off for some reason．(hold)

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As we all know, it was _________(他的粗心)that resulted in the car accident．(careless)

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You _________(没必要告诉)her the news yesterday, for I had told her earlier．(need)

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有钱人未必总是快乐。

The rich _________ not _________　_________．

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我宁可向朋友借钱，也不愿拒绝帮助你。

_________　_________ refuse to help you, I _________ borrow money from my frends．

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希望你能克服粗心的毛病。

You are supposed to _________ yourself _________ carelessness．

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我不想去了，再说我也很累。

I don't want to go; _________　_________, I am too tired．