Is the door_____now? It’s so cold.—Sorry,I will keep the door________.

When do youyour parents to stop offering you money? —After I get my first job．

____ students are there in your class?— Forty-one. [ ]

I find this Math problem very ______. I believe students can work it out ______.

Do you know the boy _____ father is a bus driver?—Yes, he is my friend.[ ]