The robber was caught by two men ______ police uniform _________.

A．in; at the once      B．in; at once         C．on,; at the once     D．on; at once

 

【答案】

B

【解析】

試題分析：in在里面;on在上面;句意:劫匪立即被兩個身穿警服的男人抓住了.介詞in可以表示穿某種衣服,短語at once立即,不要冠詞,故選B.

考點(diǎn)：短語及介詞辨析

點(diǎn)評：固定短語的考查也是英語考查的一個重點(diǎn)，熟記這些短語結(jié)構(gòu)及固定搭配可以減少答題中的分析判斷時間，所以平時加強(qiáng)短語記憶也是學(xué)好英語的關(guān)鍵環(huán)節(jié)。英語介詞的一個特點(diǎn)是一詞多義，并且介詞間語義交叉現(xiàn)象很多，習(xí)慣用法也很多，有時很難從詞義上區(qū)分開來。故學(xué)習(xí)中要注意不斷總結(jié)，熟記一些介詞和動詞的固定搭配用法及習(xí)慣用法，是完成此類問題的捷徑。

 

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