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【題目】He turned from side to side, eyeing himself in the mirror with a serious, studied ______ that soon changed into a smile.
A.impression
B.expression
C.conclusion
D.information

【答案】B
【解析】考查名詞詞義辨析。句意:他從一邊轉向另一邊,看著鏡子里的自己從嚴肅學究的表情瞬間變成了笑臉。A.impression 印象;B. expression表情,表達;C. conclusion總結; D. information信息;根據句意,故選B項。

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