1．If the house is ____ fire，_____ where is the nearest exit．（　�。�
A．in； findB．on； find outC．catches； findD．on； find

分析 如果房子著火了，弄清楚最近的出口．

解答 答案：B．be on fire 著火，為固定搭配，A in錯誤，C catches前不能使用is，而where is the nearest exit是需要查清楚的內(nèi)容，應(yīng)使用find out．find側(cè)重找到，find out側(cè)重找出，弄清楚，查明白．

點評 本題考查介詞的辨析及find/find out的區(qū)別．平時應(yīng)多注重固定介詞短語的搭配及相近單詞或短語的區(qū)別．

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