2016年公共英语写作强化：句子的转换
It引导的形式主语句子与其他句型的转换
「例句」
He spent 4 hours in doing his homework yesterday.
It took him 4 hours his homework yesterday.
It seems that they like pop music.
They to like pop music.
「正确答案」5.to do6.seem
「规律分析」这部分要求了解代词it在句子中的各种用法。it在英语中是个相当活跃的代词，它可以作形式主语、形式宾语和引导强调句等。
