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.
，则
．由R=
gt2得，t=
，则水平位移x=v0t=
?
．故B、C正确．
，设落地时速度与地面的夹角为θ，有tanθ=
=
．故D错误．