—The Chengdu Horticultural Exhibition（成都园艺博览会）is really excellent! Thanks for inviting me here!
—______
| A． |
I’m sorry. |
B． |
You’re welcome. |
C． |
No problem. |
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