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2. 他具有廣博的法國歷史知識。（a wide knowledge of)

2. you, had better, go,there  

(   ) 3. You       finish your homework before you play computer games.

A. ought    B. ought to

C. oughted to    D. oughts to

3. 說起來容易做起來難。

4. Teenagers need their parents to       (引導）them.  

4. Work hard, and you can catch up with your classmates.(改為同義句)

Work hard，             you can't catch up with your classmates.

2. 他巳經逐漸明白保護環境的重要性了。
He             the importance of protecting the environment.

2. The young tree grows taller and taller ________________ (一天天地）.