(2013·北京高考)If we a table earlier, we wouldn't be standing here in a queue.
A. have booked
B. booked
C. book
D. had booked
网友回答
A. have booked
B. booked
C. book
(答案→)D. had booked
解析：选D 考查虚拟语气。句意：如果我们早点儿预订了餐桌，(现在)就不必在这儿站着排队等候了。本句是混合虚拟语气，从句是对过去情况的假设，主句是对现在情况的虚拟，故从句用过去完成时。