_________advice my teacher gave me! It has influenced me a lot．（ ）
| A． |
What a helpful |
B． |
What helpful |
| C． |
How helpful |
D． |
How a helpful |
I wonder if Tom______ this afternoon．
Don't worry．I will tell you as soon as he_______．（ ）
A．will come； comesB．comes； will come
C．comes； comes
The school sports meeting will be_______ because of the heavy rain．（ ）
A．put upB．put onC．put off
If more people give up driving cars，the air will get much _______ in a few days．（ ）
A．cleanB．cleaner
C．the cleanest
The number of people in the city ______ about seven million now．（ ）
A．areB．hasC．is
It's necessary for you _______the classroom clean，class．（ ）
A．keepB．keepingC．to keep