患者，女，65岁，牙列缺失三月余，体检：全身一般情况良好，口腔检查上、下颌第二磨牙均已拔除，拔牙创愈合良好，牙槽嵴中等丰满，倒凹不明显，黏膜牙合组织无异常发现，上、下颌位置关系正常。

在无牙颌模型上哪一区域容易形成支点，使上颌义齿产生前后翘动（）

A.颧突区

B.切牙孔区

C.前弓区

D.腭皱

E.腭大孔区

根据句意和首字母的提示补全单词.

1. My f _____ subject is Biology.

2. On Tuesday afternoon, I often go to play the drums in the school b _____ .

3. We have eleven subjects this t _____ .

4. Please w _____ and tell me about your subjects.

5. I like listening to songs, and I also like s _____ songs.