When waiting for a bus() a bus stop ,you must stand () line.添介词

问题描述:

When waiting for a bus() a bus stop ,you must stand () line.添介词

When waiting for a bus(at) a bus stop , you must stand ( in) line
at) a bus stop 在公交站台
stand ( in) line 排队

at in

at in
请及时采纳,多谢!