Ⅰ.单项选择
( )1.[2015·荆门改编]—Look! How clean the classroom is!
—Yes. I'm sure someone ________ it up.
A．cleans B．has cleaned C．is cleaning
( )2.[2017·自贡]“Julie, the more you practice, the ________ you will play the piano，” said her Dad.
A．well B．better C．best
