词汇(本题共15小题；每小题1分，满分15分)
A) 请根据括号中的中文提示，英文译义或句意，写出句中所缺单词。
1. He drives r______(quite)fast,and it is very dangerous.
2. Your suggestions are of great ______(价值)to me.
3. Do you like the ______(背景)music of the film?
4.Please return my book to me________(at once)
5. It’s a good h______to go to bed early and get up early.