问题描述:
There are about seven____students in their college.
A.thousands B.thousands of C.thousand D.thousand of
选哪个?为什么?其余的哪里错了?
A.thousands B.thousands of C.thousand D.thousand of
选哪个?为什么?其余的哪里错了?
问题解答:
我来补答展开全文阅读