The coach because of the driver’s carelessness was and crashed over the cliff on such a

问题补充：

The coach, because of the driver’s carelessness, was and crashed over the cliff on such a cold December morning.

A. in support

B. out of control

C. in charge

D. at the mercy

答案：

A. in support

(答案→)B. out of control

C. in charge

D. at the mercy

解析：out of control意为“失去控制”；A项意为“支持”；C项意为“负责；掌管”；D项意为“任凭……的摆布（而无力保护自己）”。