The children all looked _______at the broken model plane and felt quite____.

Is it your brother playing football outside? — It ________ be him. He is helping mother with dishes now.

Could you tell me _____? I must find him. —-Sorry. I have no idea. But he was here just now .

Please _____these things to your brother.

Do you think it is _____ to write an English essay?—Yes, you can do it ______ if you practice more.