- - How dangerous it was!- - Yes, but for the passer - by' s quick action, the child A. w

网友回答

A. was drowned
(答案→)B. could have been drowned
C. had been drowned
D. should have drowned
解析：考查虚拟语气。句义：多危险啊！是，要不是过路人的快速行动，那个孩子可能会被淹死。把握关键词but for，是对过去的虚拟，主句当然是过去的虚拟：would/could/should + have done,在根据句意孩子和淹死之间是被动关系，所以B正确。