Are you parents going to working () bikes or () bus?

问题描述:

Are you parents going to working () bikes or () bus?
Are you parents going to working () bikes or () bus
A on their ;by
B by ;by
C on ;on the
D by;on a
是选D吗.请说明下

by bus ,by bike 都是固定搭配,记住!
如果你没打错,bike的确是复数,就用A,bike不是复数,就是B