以下关于牙体缺损修复中增加患牙抗力的措施，正确的是（）

A.尽量保留牙体硬组织

B.嵌体洞斜面

C.高嵌体

D.去除薄壁弱尖

E.进行预防性扩展

单词拼写：请根据句子意思及所给的中文或首字母提示完成单词。

1. Giraffes are very c _____. We like them very much.

2. I like dolphins. They are f _____ to human beings.

3. Do you know where pandas come from? Yes. They come from C_____.

4. Lions are from S _____ Sfrica.

5. Miss Gao looks very b _____  in this new dress.

6. A _____ (地图) can help you when you are in a new city.

7. Let's see the monkeys. _____ (为什么) do you want to see the monkeys?

8. How long does your baby _____ (睡觉) every day?

9. Can you tell me where the _____ (动物园).

10. _____ (在……期间) the summer holiday, he goes to visit his grandmother.