[SC总结] 虚拟表达

Developing nations in variousparts of the world have amassed $700 billion in debts; at stake, should asignificant number of these debts be repudiated, is the solvency of some ofthe world’s largest multinational banks.

(A) should asignificant number of these debts be repudiated, is

(B) should asignificant number of these debts be repudiated, are

(C) should theyrepudiate a significant number of these debts, are

(D) if there is arepudiation of a significant number of these debts, would be（A）

(E) if asignificant number of these debts will be repudiated, is