Sun Tiantian , _______ , is a professional tennis player from Zhengzhou.
-_____ you _____ your drawing? -Not yet. It will be done in a few minutes.
The teacher told us the earth ________ around the sun.
He’s been in China for two years. And he’s used to _______ in China.
_______ his help, we finished the work on time.
-_____ have you worked? -Since 2 pm.