--What are you doing?

--I'm thinking about 　　　 at the class meeting.

　　　 A. how to say　　 B. what to say　　 C. how be says　 D. what is to say

I’ll give a talk tomorrow. I’m thinking about_______.

I'm thinking about ________ and ________.

[　　]

A．what to say it; how to say it

B．what to say; how to say

C．what to say it; how to say

D．what to say; how to say it

I’ll give a talk tomorrow. I’m thinking about           ．

A. what to say        B. how to say

C. what can I say      D. how can I say