根据所给的中文提示，写出正确的单词或词组，注意时态的变化:

1.This kind of school bags are _____ _______(特价) this week.

2. Of course, we have some that are different in __________(样式,款式).

3. There’s no hurry, please _______ _______ __________(慢慢来,别着急 ).

4. When we are walking in the street, we can see lots of road ________(标志).

5. Edison is a famous inventor and __________(科学家).

6. Some animals can be trained to work for ______ ______(人类).

7. If you help me, I will give you 100 dollars as a ________(报酬,奖赏).

8. Scientists _______ _______(指出) that pigeons have very good eyesight.

9. The sign _________(警告) people not to swim here.

10. It may be _______(可能的) for geese to give a warning.

11. Perhaps when you watch _________() you will find out the answers.

12. Don’t ________(碰,摸) the steel balls, they are very dirty.

13. It is ________(相信) that apes can help human beings make cars.

14. I’m going to ________(爬) Mt. Emei with my friends.

15. Will you go to the ________(海边) with me?