问题
选择题
There must be many people ________ for their trains at the train station because of the golden week holiday.
A． are waiting
B．waited
C．to wait
D．waiting
答案
答案：D
题目分析：句意：因为黄金周，在车站一定有很多人在等待他们的火车。本题考查There must be sb doing sth.某地一定有人在做某事。根据句型，故选D。