根据句意和提示写出单词，完成句子。

1. I'd love to join you in the camping, but I have _____ (允诺) to go cycling with John.

2. Look at the sign!We are not _____ (允许) to park cars here. 3.Would you please help me look after

    my dog while I am _____ (离开)?

4. Our Maths teacher spent 2 hours _____ (解释) the tough problems to us like this.

5. I can't tell you  _____ (是否) it's a good book or not without reading it.

6. It's over four months since we Chinese people celebrated our Party's n_____ birthday on July 1st.

7. Look at the dark clouds in the sky. P_____ it is going to rain in the afternoon.

8. Kung Fu Panda II is a fantastic film and I want to see it, but I haven't made a d_____ now.

9. Don't be nervous. If you try to be r_____ in the exam, you will get high marks..

10. Grandma has got a toothache. She is at the d_____.

11. There are so many good programmes that I can hardly make a _____ (choose) among them.

12. Lucy and Linda didn't tell us the news. They wanted to keep the secret to _____ (they).

13. The boy hates to follow others and likes doing everything _____ (different)

14. Can you tell me why the twins are quarrelling more _____ ( noise) than usual?

15. She is grateful to you for giving her so many _____ (value) advice on how to cook.