----What’s that noise?
---- There’s a truck stopping outside．It’s someone something.
A. deliver
B. to deliver
C. delivering
D. delivered
网友回答
A. deliver
B. to deliver
(答案→)C. delivering
D. delivered
解析：句意：--噪音是什么?—外面停着一辆卡车。是有人在运送东西。这里用现在分词做定语，因为someone和deliver是主动关系，用现在分词。选C。