患牙严重龋坏，拔除后见根尖区附着一团组织（）
A.急性根尖周炎
B.根尖囊肿
C.牙槽脓肿
D.根尖肉芽肿
E.慢性根尖脓肿
参考答案：D
根据句意和音字母提示填空。
1. W_____ to our school, Lily and Frank.
2. Can you do some Chinese c_____?
3. Do you m_____ playing games here?
4. We like to watch A_____ World, it's fun.
5. Eating apples often can make us h_____.
在有余数的除法里，除数是7，最大的余数是______．
