The poor man's life was ______ of the king.(a) at the mercy(b) at the call(c) at the service(d) at the expense狂不理解,
问题描述：
The poor man's life was ______ of the king.
(a) at the mercy
(b) at the call
(c) at the service
(d) at the expense
狂不理解,
答
A
A是固定词组搭配 at the mercy of
A是施恩,在什么什么的掌控下,任人摆布
B没听说过
C是在服务中- -
D好像也没这种说法的