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試著說出It的用法。

It's surprising that he should ask me such a difficult question．

It做________主語；指代________從句。

試著說出It的用法。

It's no use crying over spilt milk．It做________主語。

試著說出It的用法。

We published it that we had won the football game．

It做形式________；指代________從句。

試著說出It的用法。

You may find it exciting working here．It做形式________；指代________短語。

下列詞匯為本單元出現(xiàn)的考綱詞匯的派生詞。填填看，掌握了它們的用法了嗎？

1．New furniture is too ________; we'll use the old pieces．

2．The railroad connects two cities, ________, New York and Chicago．

3．He surrounds himself with attractive, ________, or well-known people．

4．The steam engine is a ________ invention．It marks the coming of a new era．