– Can a plane fly the Atlantic Ocean?--Yes but it needs to go the clouds for hours.A. a

问题补充：

– Can a plane fly the Atlantic Ocean?

--Yes, but it needs to go the clouds for hours.

A. across, through

B. through, across

C. across, across

D. through, through

答案：

(答案→)A. across, through

B. through, across

C. across, across

D. through, through

解析：across穿过，横穿；through通过，穿过，强调从内部通过。句意：飞机能飞跃大西洋吗？——是的，但是穿过云层需要几个小时。结合语境可知上文表示在表面横穿，下文表示在内部通过，选A。