—How is the weather in winter in Bejing?—It’s ________.

 —Do you think twenty people are enough for the work?—No. I am afraid we need at least______ students.

We're busy because we have so        housework to do today.

Our city is one of _________cities in china.                        

He was lost in the busy streets. But at last it was _______ of him to find the way home.