完型1.Some cities are crowded.They have bus or train s____ to help people travel through them.
问题描述：
完型1.Some cities are crowded.They have bus or train s____ to help people travel through them.
答
Some cities are crowded.They have bus or train stations to help people travel through them.
意思：
有的城市人很多。它们都有公共汽车或者火车站让人们坐。
答
services
答
Some cities are crowded.They have bus or train stations to help people travel through them.