—I really like the MP3 disc you lent me last week. — .
—Which one of these two dictionaries do you advise me to buy, Oxford or Longman? —Well, take Oxford. I think it is the ________ of the two.
Nothing that you say can change his mind, ________?
The smoggy weather has made us realize ________ terrible problems we are faced with.
—How unhappy your roommate looks! —Yes, but he's not willing to tell me what it is ________ is troubling him.
When the millionaire was young, he was very poor. Only by doing parttime jobs during the summer holiday ________ afford to pay his college fees.