【題目】I was taught to sit quietly in class and not to speak______ someone asked me a question.

A.WhenB.unlessC.becauseD.if

【答案】B

【解析】

考查連詞。句意：我被教導(dǎo)要靜靜地坐在課堂上不說(shuō)話除非有人問(wèn)我問(wèn)題。A. when當(dāng)……時(shí)候；B. unless除非；C. because因?yàn)椋?/span>D. if如果。根據(jù)句意，除非有人問(wèn)我問(wèn)題，在課堂我就安靜地坐著不說(shuō)話。用unless引導(dǎo)條件狀語(yǔ)從句。故選B。

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