－Can you tell me Kitty’s address.

－I don’t know, either. But I’ll tell you her address when she ______ to me.

A．writes

B．write

C．wrote

D．written

C和Si元素在化学中占有极其重要的地位。写出Si的基态原子核外电子排布式______。从电负性角度分析，C、Si和O元素的非金属活泼由强至弱的顺序为______。