问题
选择题
People ______ long distances frequently have to decide whether they would prefer to go by land, sea or air.
A．to travel
B．travelled
C．travel
D．travelling
答案
答案：D
搜题请搜索小程序“爱下问搜题”
People ______ long distances frequently have to decide whether they would prefer to go by land, sea or air.
A．to travel
B．travelled
C．travel
D．travelling
答案：D