10. Is this the reason at the meeting for his

carelessness in the work?

   A. he explained   B. what he explained

   C. how he explained   D. why he explained

10. A

10. A解析：考査定語從句關系詞的選 用。首先將題干疑問句變成陳述語序， 即:This is the reason...，分析句子結構 可知先行詞為the reason ,引導詞作從 句中explain的賓語，可用that ,又因關 系代詞充當賓語時可以省略，故答案為 A項。

題目來源：2016年周測月考直通高考高中英語必修3外研版 > 周內(nèi)課時練20 Period Four Grammar & Writing

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