we much longer we might not even have had the spot on the rooftop.A. Should; hesitateB

问题补充：

we much longer, we might not even have had the spot on the rooftop.

A. Should; hesitate

B. Was; hesitating

C. Did; hesitate

D. Had; hesitated

答案：

A. Should; hesitate

B. Was; hesitating

C. Did; hesitate

(答案→)D. Had; hesitated

解析：考查虚拟语气。当表示与过去的事实相反时，主句用would/might/should+have done；而从句用had done。根据might not even have had可知，是对过去的虚拟，从句用过去完成时。本句省略了if，把had提到了句首，完整形式应该是if we had hesitated...。故选D。