A study shows a ______ walk every day can keep people from becoming fat.A. 30-minute B. 30 minute’s C. 30 minutes’
He is going to study hard at math. He wants to be ________ engineer.
--There are forty-eight students in our class. --___________.
--_____he have English ____Thursday? --Yes!
--Look at these shoes. They are only $16. --They are cheap. __________.
Bob is ___________brother.