I often make mistakes ___________ grammar..
—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.
—Sorry, I just come here. Ask the old woman, she _______ know something about it.—Thank you all the same.