_______ rapid progress our country is making in science and technology!
So it is. We are enjoying the convenience of modem technology.( )
How
What
What a
What an
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
I didn't realize he was a famous scientist ______ you told me.( )
A.untilB.becauseC.since