问题

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

正确答案是：

同类题型

Jim was listening to music _______his sister was playing with a toy.

If it tomorrow, I fishing in South Lake.

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What do you think of the service of this hotel? — Excellent! They do their best to ______ the guests’ needs.

When her father came back home, Joan_____ with her friend.