Why don’t you hand in your homework— I’m sorry. I _____my homework at home.

下列各句中，没有语病的一句是

It’s supposed to rain tomorrow. —I know, but the forecast ___ be wrong. Weather forecasts are far from 100 percent accurate.

______ smiling and one day life will get tired of upsetting you.

All men are created equal and every child has the equal right to receive education _______ their financial background.