Question

8. All of     sudden some passengers on    board let out screams, running upstairs like crazy.

A. a; /          B. the; the

C. a; the       D.  the; /

Answer 1

8. A考查冠词的用法。句意：突然，一些在船上的乘客发出尖叫，发疯地向楼上跑。all of a sudden意为"突然"，是固定短语；on board是固定短语，意为"在车上/船上/飞机上"，所以选A。