The ancient penguin was modern ones and it was good at swimming but couldn’t fly.

Mrs. Black doesn’t know if her American friend_____ to Heilongjiang. If he_____ here, she will meet him at the airport.[ ]

Lucy is a(n) student, she answers the teachers’ questions in her class.

_____, a form must be filled in.

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