请教一道题

TracyWei

Rejecting the apprenticeship model of training social workers in philanthropic agencies,
twentieth-century reformer Edith Abbott was convinced of social work education belonging in
the university so that students could be offered a broad range of courses dealing with social
issues.

(A) of social work education belonging in the university so that




(B) that social work education should be in the university, and that
(C) about the importance of social work education belonging in the university while
(D) that social work education belonged in the university, where
(E) of the necessity of social work education being in the university and

我当时想的是虚拟结构，convinced that 后面加原型，于是这样跟答案就有出入了，但回头想想觉得又不像是虚拟用法，跟require等词有区别。不知道哪个大牛可以给我讲讲虚拟的这种结构的一般规律！万分感谢

fylonglong

LZ可以看看置顶的帖子，说的是在表示要求，如require,request;命令，如order,command;建议，如suggest,advise等后面要用虚拟语气，而且should必须省略。