Question

8. He was so rude！ I     away then, but I didn't want to ruin the party. 

A.    should have walked

B.    must have walked

C.    must walk

D.    ought to walk

Answer 1

8.    A考查虚拟语气。句意：他太粗鲁了！那时我本应该离开的，但我不想破坏聚会的气氛。should have done表示"应该做某事而事实上没做"。