________ we ________ much longer, we might not even have had the spot on the rooftop.
A．Should; hesitateB．Was; hesitatingC．Did; hesitateD．Had; hesitated
D
考查虛擬語氣。當表示與過去的事實相反時，主句用would/might/should+have done；而從句用had done。根據(jù)might not even have had可知，是對過去的虛擬，從句用過去完成時。本句省略了if，把had提到了句首，完整形式應該是if we had hesitated...。故選D。
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