男，48岁。主诉颊粘膜白色斑块约一年，检查见左侧颊粘膜约1cm×l.5cm的白色斑块，界限清楚，微高出粘膜，表面有小结节状突起。诊断可能是

A．红白斑，上皮单纯增生

B．慢性盘状红斑狼疮，伴上皮异常增生

C．二白斑，伴上皮异常增生

D．白斑，上皮单纯增生

E．扁平苔藓，伴上皮异常增生

根据句意，用括号内所给单词的适当形式填空。

1. I like P.E. best. Because my P.E. teacher is very ________ (friend) to us.

2. — Where is your bedroom? — It's on the                (two) floor.

3. — Thank you for your help. — It's my ________ (please).

4. All the books are on these ________ (shelf). You may go to find it.

5. Kangkang likes ________ (dance) at the party, because it's interesting.