问题

A moment, please. I’m checking if Mrs. Brown _________ free tomorrow.
A:is
B:being
C:to be
D:will be
B:being
C:to be
D:will be
正确答案是:
同类题型
This morning Jack came to school _________ than _________ student in his class.
The house they live in was built hundreds of years ago. [ ]
Whose ping pong bat is this? — I’m not sure. I think it ______be Tom’s.
__is that on the desk?–My Chinese book.
________of the land in that district________ covered with trees and grass.