【題目】— I wonder ___ Mary has kept her figure after all these years.
— By working out every day.
A.where
B.how
C.why
D.If

【答案】B
【解析】考查賓語(yǔ)從句。句中1 是主語(yǔ),wonder是謂語(yǔ),how 引導(dǎo)的賓語(yǔ)從句在整個(gè)句子中做賓語(yǔ)。連接副詞how 是賓語(yǔ)從句中的方式狀語(yǔ)。句子是用表示方式的介詞by回答的,所以是針對(duì)方式題問(wèn)的,故用how ,根據(jù)句意—-我好奇瑪麗在這些年是怎么保持著身材的,----通過(guò)每天鍛煉,故選C。

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