【题目】—Why are so many people gathering there?
—Several people seem _________. Let's go and see.
A. being dancing B. dancing C. to be dancing D. to have danced
在线课程【答案】C
【解析】考查动词的固定结构。句意：——为什么这么多人聚在那里？——几个人似乎在跳舞。让我们过去看看。seem to be doing sth.似乎正在做某事，故选C。