---Why don’t you stay here for a few more minutes?---_____, but my parents will be worried.
She wants three ________ and some ________.
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.