There is reason to believe that most writers have difficulty in the opening paragraphs of

问题补充：

There is reason to believe that most writers have difficulty in the opening paragraphs of their papers.

A. constituting

B. constructing

C. comprising

D. founding

答案：

A. constituting

(答案→)B. constructing

C. comprising

D. founding

解析：construct“建造；构造”；constitute“组成”；comprise“由……组成”；found“成立；创建”。由题意可知，B项符合题意。