【題目】After losing contact for twenty years, they met again _________ in a party．

A．by mistake B．by coincidence

C．on purpose D．on display

【答案】B

【解析】

試題分析：考查介詞詞組辨析。A．by mistake錯(cuò)誤地 B．by coincidence偶然地，碰巧C．on purpose故意地D．on display公開展出；句意：在失聯(lián)了二十年后，他們偶然地又一次在派對(duì)上碰到。根據(jù)句意，故選B.

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