Most people are________building a paper factory near here.They are worried the river will get polluted.
–– Will you go to the park after school? ––No, I’ll go home, for my mother is waiting for me for supper.
Mary often _______ her friends ______ her life in China.
My English teacher stands between sally and _______ .
The Greens walked ________ the door just now.
China is a big country ________ a long history.