_____ the night, we did nothing but _____ there, waiting for him to come.

A．All through; sit

B．All over; to sit

C．Whole; sitting

D．Throughout; sat

环甲膜切开术不宜超过（）小时，应转作气管切开术。

A.12小时

B.24小时

C.36小时

D.48小时

E.72小时