【题目】If they earlier than expected, they here now.
A. had started; would be B. started; might be
C. had started; would have been D. will start; might have been
在线课程【答案】A
【解析】考查虚拟语气。句意：如果他们比预期早出发，他们现在就在这里。这是一个混合虚拟语气的句子，从句是对过去的假设，故要用had done；主句中有now，是对现在的假设，故要用would/could/might do。故选A。