32. The company ___ the management of its archives, but has been unable to do
so.
(A) is outsourcing
(B) outsources
(C) is outsourced
(D) should outsource
正确答案是D,我对于答案是没有疑问。
但是我的疑问题目出的句型觉得很怪,
不是只有S+should/could/might+have p.p. 才能单句呈现吗?
其他的都要If S +...., S+.....的句型吗?
再请协助解惑,谢谢。