-- _____is that used for?---_____ the floor.
--There is ___ food on the table for you, Xiao Ming.---Thank you, Mun, But I __ eating anything now.
--I came ___ two idioms which puzzled me on the cover of an old book which I was looking for a new material in yesterday.---Why not go to the teacher for ___ about them?
--What did the teacher say to you just now? ---She asked me ___.
This building is ___ that one.
Will you please try to ___ the article ___ to about 3000 words?