Once ( ) man wanted to go across ( ) river by ( ) boat.A.a…a…a B.a…a…/ C.a…/…/ D./…/…/
问题描述:
Once ( ) man wanted to go across ( ) river by ( ) boat.
A.a…a…a B.a…a…/ C.a…/…/ D./…/…/
答
B.a a /
前两个空选A是因为泛指,第三个空是因为by boat是固定词组 表乘船