-- _______ is it from Beijing to New York?--More than 30,000 miles.
Tom looks ________, for he hardly ever exercises ____ his free time.
--________ does your father visit your grandparents a week? –Once.
--________ do you have PE? –Every Monday, Wednesday and Friday.
We have to work for ________ to finish the work.
The sea water is _______ for anybody to ______.