Question

The boy’s bad behavior at school __________ his mother many sleepless nights.

A．cost

B．made

C．caused

D．led to

Answer 1

A

试题分析：句意：这个男孩在学校的不良表现使得他的妈妈度过了许多不眠之夜。主语是The boy’s bad behavior，可知选A。