Readers are required to _________ the rules of the library and mind their manners.

To my great ______ , he finishedthe work only in a few days.

May I go and play with Dick this afternoon，Mum—No，you can’t go out________your work is being done.

Is Jack in the classroom now—––No, he football on the playground.

We can never forget the days _______ the three astronauts in spaceship worked together and the days ________ we spent together [ ]