—Do you think the thief entered through the window?

问题描述:

—Do you think the thief entered through the window?
—No,if he had,I don’t believe,_______ broken the living-room’s window.
A.he would have\x05\x05\x05B.he must have
C.he had\x05\x05\x05\x05D.should he have
选什么.为什么选这个,

D 虚拟语气,这是省略句引起的倒装,完整的句子是If he had entered through the window,he should have broken the living-room’s window.