【題目】The ________ expression on her face suggested that she _________ the _________ physics problem.

A.puzzling;was puzzled by;puzzled

B.puzzling;be puzzled over;puzzled

C.puzzled;be puzzled by;puzzling

D.puzzled;was puzzling over;puzzling

【答案】D

【解析】

試題分析:考查動詞。句意:她臉上困惑的表情顯示出她正在因那道令人費(fèi)解的物理題而困惑,puzzled以人為主語,puzzling以物為主語,表示令人困惑的,be puzzling over 固定用法,表示因...而困惑,故選D項(xiàng)。

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