Lotsofrescueworkerswereworkingaroundtheclock，suppliesto...

问题详情：

Lots of rescue workers were working around the clock，supplies to Yushu，Qinghai province after the earthquake（　　）

A．sending B．to send  C．having sent  D．to have sent

【回答】

A

知识点：非谓语动词

题型：选择题