with so much homework to do,David told his sister_____so much noise.
Asimov began having his stories ______ in science magazines in 1939.
It was ______ Asimov was eleven years old ______ his talent for writing became obvious.
—Sorry, I made a mistake again.—______. Practice more and you’ll succeed.
I’d like to ______ you _______ your success on the experiment.
It is generally believed that teaching is ______ it is a science.