武汉到蕲春火车:by a bus与by bus的区别

by a bus与by bus的区别 bus bus ,by a bus ,)ride bike ,ride a bike ? by bus=? take the bus by the bus I can go to the bank by bus. 改为同意句 I can ( ) a bus a ( ) the bank. She____(go) to school by bus everyday She never by bus to school. (改错) Did they go by bus是什么意思? I go to school by bus .(最好用take a bus ,或者其它) 改同意句_________________ What's the l_____ expensive way to travel by train,by bus or by air?