_____ is your mother?-She is fifty.[ ]

The newspaper says if more underground lines next year, it will be much easier for people to travel around Nanjing.

He isn’t good at playing _____piano, but he plays _____Chinese chess well.

Please listen to the teacher carefully, don’t _________ of the window.

I was born ___ April 20, 1985 ____ the north ____ China. [ ]