问题补充：
The engine of the ship was out of order and the bad weather the helplessness of the crew at sea.
A. added to
B. set down
C. played a part in
D. led to
答案：
(答案→)A. added to
B. set down
C. played a part in
D. led to
解析：考查短语辨析。句意为轮船的发动机出故障了，坏天气增加了在海上救助船员的困难。add to增加，增添 所以选A 。
