-Hello! ______ you Miss Zhang?-Yes, I am.
----Must I finish the work today, Mom?----No, you _______________. You can finish it tomorrow.
—May I take photos in the museum? —No, you . You obey the rules here.
—who is the man over there ? Is it Mr.Wang ? —No, it _____be him .Mr.Wang is much fatter.
---________ we clean the classroom at once?---No, you________. You ________clean it after school
---Listen! Kate is singing in the classroom.----It_____be Kate. She has gone to the Library.