15．You'd sound a lot more polite if you make a request _________ a question．（　�。�
A．in search ofB．in the form ofC．in need ofD．in memory of

分析 如果你以疑問(wèn)的形式提出要求聽(tīng)起來(lái)會(huì)更禮貌．

解答 答案是B．本題主要考查介詞短語(yǔ)辨析．in search of 搜尋；in the form of 以…形式；in need of 需要；in memory of為了紀(jì)念…；根據(jù)句句意和常識(shí)判斷，"以疑問(wèn)的形式"會(huì)使請(qǐng)求聽(tīng)起來(lái)更禮貌，所以答案選擇B．

點(diǎn)評(píng) 本題考查介詞短語(yǔ)的語(yǔ)義辨析，考生在平時(shí)的學(xué)習(xí)中應(yīng)注意積累相應(yīng)的短語(yǔ)和詞匯，并牢記其意思．在做題時(shí)，將短語(yǔ)的意思和題干相結(jié)合，從語(yǔ)法、句子結(jié)構(gòu)尤其是句意上去判斷，句意通順，符合邏輯，即正確答案．

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