问题
选择题
—Is that man in a red T-shirt Mr. Smith, your math teacher?
—It _______ be Mr. Smith. He has gone back to America.[ ]
A. must
B. can
C. shouldn't
D. can't
答案
答案：D
搜题请搜索小程序“爱下问搜题”
—Is that man in a red T-shirt Mr. Smith, your math teacher?
—It _______ be Mr. Smith. He has gone back to America.[ ]
A. must
B. can
C. shouldn't
D. can't
答案：D