It has been three months the famous painting was stolen. A．before B．since C．unti

It has been three months ________the famous painting was stolen.

A．before                                               B．since   

C．until                                                 D．unless

试题答案

B　考查连词。根据固定句型“It has been＋一段时间＋since＋其他”可知选B项。句意为：那幅名画被偷走三个月了。