All of sudden the passengers on board let out screams running upstairs like crazy. A.

问题补充：

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

A. a; /

B. the; the

C. the; /

D. a; the

答案：

(答案→)A. a; /

B. the; the

C. the; /

D. a; the

解析：all of a sudden 固定搭配；on board 在船上，固定用法，不加任何冠词。

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