—How many _____ are there in your class?
—About 63.
A.childs B.childrens C.children
The sign 
means（意思是） “ _____.”
A.No parking B.No U-turn C.No right turn
.Look! The students _____ the classroom.
A.clean B.are cleaning C.are clean
—What’s your favorite subject?
— _____ Because it’s easy and interesting.
A.Toys. B.Math. C.T-shirt.
—Hi, Lily. Happy New Year!
— _____
A.Thank you. B.Yes. C.The same to you.
— _____ does your mother usually go to the office?
—By bus.
A.Where B.What C.How
