The plane is faster than the rain,but it's____.A cheap B cheaper C expensive D more expensive

问题描述:

The plane is faster than the rain,but it's____.A cheap B cheaper C expensive D more expensive

D
飞机比火车快,但是比火车更贵.
这里要用比较级.所以排除了A,C,而B是更便宜的意思.故也排除