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题型：单选题题类：模拟题难易度：普通

江苏省南京市郑和外国语学校2019-2020学年七年级下学期英语期中考试试卷

We want to know he will come back, as we are worried about his safety.

A、how often B、how soon C、 how much D、how long

举一反三

—Do you know _____?
—Sorry, I don't know.

Excuse me, could you help me? I don't know ________ exchange money.

Jenny is on holiday now. I wonder ________.

—Do you know ?

—By underground.

—I wonder______.

—I'm not sure yet.

—Do you know ____ secondhand smoke?

—To protect our health and memory.

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