The scientist does not study nature ________ it is useful to do so. He studies it because he takes pleasure in it.
Although ________ the 2012 Nobel Prize in Literature, Chinese writer Mo Yan does not consider himself to be a “literary master”.
Helen always helps her mother do the housework even though going to school ________ most of her day.
Mr. Green stood up in defence of the 16-year-old boy, saying that he was not the one________ .
It was in the factory ________the TV sets were produced________ we met for the first time.
They demanded that the books________ to the school library at once.