_______ I could express my thanks to the traveler, he had already disappeared in the rain.
—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.