Question

I firmly believe _____ he said at the meeting was right.

    A. that                                                     B. which

    C. that what                                              D. what that

Answer 1

C

解析:

that 为引导宾语从句的连词，在 that what he said at the meeting was right 这一宾语从句中，又包含有what he said at the meeting 这一主语从句，而在该主语从句中，what用作动词 said 的宾语。