【題目】I’m not sure _______ my mother will come back home.

A.whoB.whatC.whenD.where

【答案】C

【解析】

句意：我不確定我媽媽什么時(shí)候會(huì)回家。

考查時(shí)間狀語(yǔ)從句。who誰(shuí)；what什么；when什么時(shí)候；where哪里。根據(jù)my mother will come back home.可知從句缺少表示時(shí)間狀語(yǔ)。故選C。

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