1 . 他们太累以致于在公共汽车上睡着了。
They were   __________________   they fell asleep on the bus.

2 . 根据学生的成绩来看，他成功地使自己的教学与学生的实际水平相契合。
________ the students’ exam results, he managed to make his teaching ________ the students’ actual level.

3 . 我从单纯的不快乐变成了极度的痛苦。
From being _________ unhappy I became acutely _________.

4 . 专家们往往同意，对于现在的普通学生来说，上大学仍然是值得的。
Experts ________ ________ agree that going to college is still ________ ________ for the average student today.

5 . 很多男孩沉迷于电脑游戏，并发现很难戒掉。
Many boys _____________ _____________ _____________ computer games and they find it hard to quit.

6 . 玩电脑游戏上瘾的人一下子是戒不掉的；只有让他们慢慢戒才合乎情理。
Those who are_______ _______playing computer games can't stop it all of a sudden; it only_______ _______to let them quit gradually.

8 . 我想我将用到一篇关于农民们使自己的土地免受化肥影响的报告。
I think I'm going to use a report about how farmers are ______ their fields ______ ______ ______ fertilizers.