I think this trip was well worth we had paid.A. thatB. whatC. whichD. how

问题补充：

I think this trip was well worth we had paid.

A. that

B. what

C. which

D. how

答案：

A. that

(答案→)B. what

C. which

D. how

解析：考察代词用法，根据句子结构可知，该句为宾语从句，从句中缺少paid的宾语，所以选择what

句意为，我认为这次旅行很值得我们所付出的。