14．I guess we've already talked about this but I'll ask you again just _____．（　�。�
A．in returnB．in caseC．by natureD．by chance

分析 我想我們已經(jīng)談過這個(gè)問題了，不過為了以防萬一，我再問你一次．

解答 B 考查介詞短語．in return"做為回報(bào)"；in case"以防，萬一"；by nature"天生"；by chance"偶然"，根據(jù)句意：不過為了以防萬一，我再問你一次．所以答案選B．

點(diǎn)評(píng) 介詞的題目要認(rèn)真掌握好常用介詞的主要用法及動(dòng)詞與介詞的搭配．這是考查的重點(diǎn)，也是做題的基礎(chǔ)．在具體的題目中，要首先判斷考查方式，是考查介詞辨析，介詞短語，還是帶介詞的定語從句，判斷后再做分析．

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