患者女，62岁，全口义齿初戴时感到左下牙槽嵴顶有尖锐刺痛，不能受压，检查：牙槽嵴顶光滑平坦，试分析原因（）

A.咬合平衡

B.基托边缘过锐

C.基托在硬区缓冲不足

D.基托组织面有小结节

E.牙槽嵴顶有骨刺的存在

用单词的适当形式填空。

1.  It is raining.  You need_____ (take) the umbrella.

2.  She can't go to school because of her _____ (ill).

3.  Don't worry about _____ (I).  I am feeling well.

4.  What's______(worry) you now?

5.  She is very_____   (worry) about her sick mother.

6.  If it _____  (rain) tomorrow, I_____ (not) go home.

7.  If he _____  (come) here, I _____ _____  (tell) you.