问题描述:
it is the first time that he ___late for school
A is B has been
为什么是B 而不是A
强调都是用现在完成时吗?
A is B has been
为什么是B 而不是A
强调都是用现在完成时吗?
问题解答:
我来补答展开全文阅读
问题描述:
问题解答:
我来补答