.How dirty the tables are! They need___.to clean B. cleanC.cleaning D. Cleaned
You’re supposed to_______instead of _______ in Korea.
It’s too cold.Do you mind ______ the window?
I often ________ visit a friend’s house.
John _______ Beijing yesterday. A.arrived at B arrived C.reached to D.arrived in
David felt very happy.________, it was his first time to have a trip to China.