1.It takes a long time to walk there.
2.B four-day 为形容词,修饰trip,意思是:四天的
3.B home前省略介词to,再如:go home
4.He often goes to work by subway.
1.It takes a long time to walk there.
2.B four-day 为形容词,修饰trip,意思是:四天的
3.B home前省略介词to,再如:go home
4.He often goes to work by subway.