—Look!Mrs.Smithisstandinginfrontoftheteachingbuilding.—...

问题详情：

—Look! Mrs. Smith is standing in front of the teaching building.

—It______ her. She has gone to Egypt for her holiday.

A. must be               B. mustn’t be       C. can be               D. can’t be

【回答】

D

知识点：情态动词

题型：选择题