Do you think cats ____________

The cars give off a great deal of waste gas in the street.—Yes, But I’m sure something will be done toair pollution.

Why is he unhappy? —He has a case_______he is being accused of stealing

Did Tom win the 200-meter race at our sports meet? —Of course not. I’m a poor runner and he did _______ than I.

Man _____ profit, sometimes even being unaware of the harm he has done to the environment