English is ________ useful language so that most people speak it as ________ second language.

Everyone knows that _____ sun is in the center of the solar system（太阳系）

—What can I do for you, madam?
—I want __________ orange skirt for my daughter. Have you got any?

A little boy wrote _____ “u” and _____“n” on the wall.

Green is the color of _______ nature. And you can enjoy the colorful rainbow in _______ sky after the rain.

Damao can play     basketball and he can also play    violin.

There is       “s” in the word “desk”.

I think it’s_________ useful advice，so I will always remember it．  

Linda is       kind girl. Everyone in our class likes her.

Mike started playing _________golf when he was 3 years old.