— Where did they go ________ vacation? —They went to Shanghai.
I don’t know his ______, so I can’t write to him.
—Linda, ______ do people in Thailand celebrate the Water Festival?—They throw water at each other.
Peter likes to improve his health ______ doing sports every day.
______ mooncake on the plate looks delicious. I want to eat ______.
—-Would you please help me to take these books downstairs?—-_______ .