【題目】—Mike, can you tell me how to speak in an online class?

—Sure, click on this icon you start to speak.

A.afterB.untilC.beforeD.since

【答案】C

【解析】

句意：——邁克，你能告訴我怎么在網(wǎng)絡(luò)課堂上講話嗎？——當然，在你開始講話之前點擊這個圖標。

考查連詞辨析。after在……之后；until直到……；before在……之前；since自……以來。根據(jù)句中“click on this icon”和“you start to speak”可知，此處使用before，表示“在講話之前點擊這個圖標”。故選C。

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