根据句意及首字母补全在本课中出现的单词。

1. Mr White gives us some good a ______.

2. Can you s______ your name, please?

3. Please give us a r______ quickly.

4. I don't know which book to c______.

5. D______ is a kind of valuable stone.

6. There is n______ in the classroom.

7. Easy is the o______ of difficult.

8. You need to eat a lot of v______.

场地平整是指按设计图示尺寸以建筑物首层面积计算，其适用于( )。

A．场地挖土、填土、运土、找平
B．＞30cm，＜-30cm内的挖土、填土、运土、找平
C．±30cm以内挖土、填土、运土、找平
D．适用任何一个房屋建筑工程、填土、运土