Jack is late again.It is ________of him to keep others waiting.

Students should do sports _______one hour a day.—I agree. It’s good for their health.

May Iplay computer games, Mum—No, you ______. You’ve got a lot of homework to do.

They were_______ busy_______ with each other__________the time.

You needn’t take an umbrella. It isn’t going to rain.— Well, I don’t know. It do.