11.“All work and no play makes Jack a d____ boy.” means that someone who works all of the time will become boring and uninteresting.

10.They t___ to kill him unless he did as they asked.

9.They are known to set a high v____ on good presentation skills.

8.In some parts of the world there is an extreme c________, and it is very hot in summer and very cold in winter.

7.She is o_____ about her chances of winning a gold medal.

6.The big success i_____ us greatly.

5. The problem is ____________ difficult to work out.

4. We don’t like him because he is ____________ (不诚实).

3. Mrs. Liu is a teacher with 30 years teaching ____________ (经验).

2. He ___________ (答应)to come at three.