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        1. It is necessary _____ something to protect our environment.
          A.doB.to doC.doesD.doing
          B

          試題分析:此題重點(diǎn)考查固定句型,It is+形容詞 for sb. to do sth,“表示做某事對(duì)某人來(lái)說(shuō)很adj”在這個(gè)結(jié)構(gòu)中,it是形式主語(yǔ),真正主語(yǔ)是后面的不定式短語(yǔ),因此排除A、C、D故選B
          點(diǎn)評(píng):It is +adj+for sb to do   adj應(yīng)該是對(duì)做這件事的評(píng)價(jià),該題常?疾椴欢ㄊ,很多同容易出錯(cuò),同時(shí)還要加以區(qū)分It is+adj+of sb to do sth  adj應(yīng)該是對(duì)這個(gè)人做這件事的評(píng)價(jià),adj多用形容人的
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