补全对话，每空一词。

A: Hello.  1   to our school.  2   are you   3  ?

B: We are from Beijing.

A:   4     5   are you?

B: We are eleven.  We are students of Yuxin Middle School.

A: Can you   6   English?  

B: Yes,  we can. And we can speak some Japanese.

A: Can you   7  ?

B: Yes,  we can.  We can sing   8   English and Chinese.

A: Can you   9   the piano?

B: No,  we can't.  But our parents   10  .

青霉素钠在强酸条件下或氯化高汞的作用下中会发生哪种变化（）

A.分解为青霉醛和青霉胺

B.发生分子内重排生成青霉二酸

C.6-氨基上的酰基侧链发生水解

D.β-内酰胺环水解开环生成青霉酸

E.发生裂解生成青霉酸和青霉醛酸