is this the reason ____at the meeting for his carelessness in his work?A he explainedb what he explainedc how he explainedd why he explained為什么不用D而用A

熱心網(wǎng)友

A對.理由:先排除B.C.(明白吧?),D中,explain及物動詞,得有賓語,但why是副詞,不能做賓語,故錯了.A中,省略了關(guān)系代詞which/that.另外:這是定語從句.在定語從句中,當(dāng)關(guān)系代詞做賓語時,可以省略.