求XDF蓝皮书专题三：主谓一致第4题分析。

Developing nations in various parts of the world have amassed $700 billion in debts; at stake, should a significant number of these debts be repudiated, is the solvency of some of the world’s largest multinational banks.
(A) should a significant number of these debts be repudiated, is
(B) should a significant number of these debts be repudiated, are
(C) should they repudiate a significant number of these debts, are
(D) if there is a repudiation of a significant number of these debts, would be
(E) if a significant number of these debts will be repudiated, is

答案是A。如果用POE可以排除BCD，因为只能用单数形式。

我还是不太明白，能不能帮我分析一下这道题？尤其是at stake, should a significant number of these debts be repudiated, is the solvency of some of the world’s largest multinational banks这句。

感觉是倒装了两次

at stake is the solvency of some of the world’s largest multinational banks

the solvency of some of the world’s largest multinational banks is at stake

at stake表示危险

should a significant number of these debts be repudiate

a significant number of these debts should be repudiate，貌似一个插入语的倒装

够变态的

那这两句和在一起是什么样？

the solvency of some of the world’s largest multinational banks is at stake，if a significant number of these debts should be repudiate???

should be 也不像虚拟语气！

感觉这里的should是情态动词

不是虚拟