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第1题

事件处理机制能够让图形界面响应用户的操作，主要包括（ ） A、事件处理 B、事件源 C、事件 D、以上都是
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第2题

Our neighbour said that if we made more noise he would _________us to the police. A. inform of B. complain about C
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第3题

A man escaped from the prison last night. It was a long time ____________ the guards discovered what had happed.
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第4题

----- Did you have ______ difficulty talking to the foreigner ? ----- No. I only could not follow him when he spoke too
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