角膜组织中损伤后可再生的是
A．上皮细胞
B．内皮细胞
C．前弹力层
D．基质层
参考答案：A
___________ in the leg made it impossible for me to walk as fast as usual.
A．Being injured
B．To be injured
C．Having injured
D．Injured
用括号中所给单词的适当形式填空。
1.They are (we) friends.
2. (thank) for your family photo.
3.I love (she) very much.
4.These are my (sister).
5.This is (Jim) grandfather.
