Itis helpful for usto choose public transport to change traffic jams．题目和参考答案——青夏教育精英家教网——

题目内容

19．Itis helpful for us（对我们是有帮助的）to choose public transport to change traffic jams．

分析对我们来说选择公共交通去改变交通堵塞是有帮助的．

解答本题考查固定句型，it作形式主语，后面的to do不定式作真正的主语，for us是插入语，这样是为了句子的平衡，故填is helpful for us．

点评本题考查固定句式的用法，在平时的学习中注意积累与运用，达到熟练掌握的目的．

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