He usually comes here____?选哪个?

问题描述:

He usually comes here____?选哪个?
A.by ships
B.by aship
C.by sea
D.by the sea
选C 那如果说做船来怎么表示呢?

C
乘坐某种交通工具by后面不加冠词,且用名词单数形式.
by sea=by ship
by plane=by air