Question

【题目】What do you think _____ if he knew the matter?

A. to happen

B. would happen

C. to have happened

D. had happened

Answer 1

【答案】B

【解析】考查虚拟语气。do you think为插入语，可以简化之后再解题，结合从句中动词knew的形式可知，这是表示与现在情况相反的假设，所以主句用would do。