Shanghai is one of ___________ cities in the world.A. bigger B. biggest C. the biggest
Are they doing____ homework?
What are you ____?
--____ does Mary ___? ---The USA. A. When; come from B. Where; from C. How; go D. Where; come from
It’s a fine day for ____.
Dr. Brown buys me ____ orange coat. ____ coat is nice.