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题型：单选题题类：模拟题难易度：普通

——Excuse me, could you tell me _______?
——Sorry, sir. I wasn't there at that time.

A、how did the accident happen B、how the accident happened C、how does the accident happen D、how the accident happens

举一反三

I don't know ______.

— Can you tell me __________?

— He's active and energetic.

—It's so careless of you to make a spelling mistake again.

—Sorry. I couldn't remember .

I suggested that Jack ______ my place when I was away.

I'm not sure________ a 7- day holiday for the coming National Day or not. If we _________, what about travelling to Beijing to watch the flag-rising ceremony?

Could you tell me _____________?

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