travelling around big cities by taxi can cost a lot of money but it is usually --- to take the under

题目

travelling around big cities by taxi can cost a lot of money but it is usually --- to take the underground train to most places
a amazing
b expensive
c convenient
d exciting
说理由!

答案

选C
打车旅行花费大,但是地铁去许多地方很方便.
虽然这题目里面的转折设置得很奇怪,但是题干要表达的意思应该是替代很贵的出租车的交通工具,所以就抛出了地铁这个概念.那么地铁比出租车的优点不仅仅是便宜,而且去很多地方也很方便.