7. Just then, I saw some of the hairs on the string stand up. The string was _______________!

6. In the eighteenth century, Benjamin Franklin conducted _______________ experiments in

　 which he showed what electricity is.

5. He _______________ himself to be a successful man.

4. _______________ the rubbish in Beijing is a big problem.

3. It is sometimes difficult to _______________ useful information as we have so much

information to choose from.

2. How much will you _______________ for operating on her?

1. There is no _______________ that you will get through the test.

10. I look younger than my age. That’s _______________ continuous exercise.

9. I received at least 5 ____________________ gifts at my birthday party

8. You have characters playing different roles and _______________ a story.