2 . 根据句意，选择短语并以其适当形式填空。

1. The patient opened his mouth_______to say something.
2. We should always understand our parents, who usually_______our study and life.
3. _______ your accent, I guess you must be from the south.
4. The government has increased the tax twice ever since it _______.
5. Jane_______to her curiosity and tore opened the letter which was for her sister.
6. Mary found her new boss, who is bad-tempered, difficult_______.
7. You can’t imagine the trouble he had_______the company of his own.
8. It’s normal for teenagers to get rebellious (叛逆) and it’s a stage we all _______.

3 . ________(你很难集中注意力)when there are many things to consider. (concentrate) (根据汉语提示完成句子）

6 . Many bad habits can be especially difficult______(cure). (所给词的适当形式填空)

7 . 这个问题很难回答。(主语＋be＋adj. ＋不定式)
The question is __________________.

8 . At that time people would starve if food was ____________________ , especially during the cold winter months. 在当时如果食物难以找到，人们就会挨饿，尤其是在寒冷的冬季。