Your bedroom is so dirty. Would you please ________,Peter?—OK, mum. I’ll do it right away.

________ the pants? —They’re 15 yuan. [ ]

There aren’t __________ girls in the classroom.

The teacher asked the boy many questions, but he only answered ______ of them.

Paul, do you _________ an American friend?—No, I don’t. But my sister __________ one.