-- Are they ______ books?---No, they are ______ books.
-------Jim, help ____ to some bread. -------Thank you.
I like junk food very much, but I eat ______ only once a month.
---- How often does the train run to Beijing ? ----- ________ twenty minutes.
I didn’t go to the beach______ vacation. I stayed ______ home.
I feel ______ when I watch that ______ match .