9．The meeting will begin ________ 4：30this afternoon．Don't forget it．（　　）
A．onB．inC．atD．for

分析 會(huì)議將在今天下午四點(diǎn)半開始，不要忘記．

解答 答案：C．
結(jié)合語境可以推斷這句話表達(dá)的意思是"會(huì)議將在今天下午四點(diǎn)半開始，不要忘記．"，具體到某一時(shí)刻的時(shí)間前應(yīng)該使用介詞at，故選C

點(diǎn)評(píng) 英語介詞的一個(gè)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(shí)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(dòng)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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