— Tom, is your brother a member of the Swimming Club? —Yes. He _________ it for five years.
The earth(地球) is our home, and we must _____ it clean.
–What would you like to drink? --______, please.
The children are playing a game _______ "hide and seek".
Today is Halloween. I ____ as a ghost, and of course I _____ a special costume.
There are _______minutes in _______hour.