Paper money was in___________use in China when Marco Polo visited the country in __________thirteenth century.
My father was so tired that he soon fell asleep ________the candle still________.
One's life has value ________one brings value to the life of others.
—What is he like?—He is patient ________others and ________hardships.
—Shall we go for a picnic this Saturday or Sunday?—It makes no difference to me.________.
I quite enjoy painting pictures, I know that I do not have what it takes to reach the top.