We haven’t settled the problem ofit is necessary for him to study abroad.A. thatB. whether

问题补充：

We haven’t settled the problem ofit is necessary for him to study abroad.

A. that

B. whether

C. what

D. if

答案：

A. that

(答案→)B. whether

C. what

D. if

解析：主要测试宾语从句。句子中介词of需要宾语，另外结合语境可知句子it is necessary for him to study abroad应该属于选择性的，并且位于介词的后面只能选择whether。译文：我们还没有解决他是否有必要出国学的的问题。