—Whom did she try to avoid meeting?— was a certain boy with the intention of marrying her.

问题补充：

—Whom did she try to avoid meeting?

— was a certain boy with the intention of marrying her.

A. That

B. It

C. He

D. This

答案：

A. That

(答案→)B. It

C. He

D. This

解析：考查指示代词。“她在躲避谁？”“他是一个打算娶她的人。”it指代前面提到的或已经出现的人或事物。故选B。