题干
— Listen! Is Professor Johnson giving a report in the hall?
— No, it him. He has gone to Japan.
A：can't be
B：isn't
C：mustn't be
答案(点此获取答案解析）
A
— Listen! Is Professor Johnson giving a report in the hall?
— No, it him. He has gone to Japan.
A：can't be
B：isn't
C：mustn't be
