Passengers ____ by car can drive on to the ferry.

问题描述:

Passengers ____ by car can drive on to the ferry.
A travel B travelling C to travel D are travelling 选哪个?为什么?

B 现在分词作定语.Ϊʲô��ѡC?����ʽ�����ö���һ�����������I have a lot of work to do