Panama,____ country in Central America, is the only place in the world ____ someone can see the sun rise on the Pacific Ocean and set on the Atlantic.
| A．the, in what | B．a, where | C．/, where | D．a, which |
Mary worked here as a ________ secretary and ended up getting a fulltime job with the company.
| A．pessimistic | B．temporary |
| C．previous | D．cautious |
—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.
| A．best | B．better |
| C．good | D．well |
Nothing that you say can change his mind, ________？
| A．do you | B．don't you |
| C．can it | D．can't it |
The smoggy weather has made us realize ________ terrible problems we are faced with.
| A．how | B．what |
| C．that | D．which |
—How unhappy your roommate looks!
—Yes, but he's not willing to tell me what it is ________ is troubling him.
| A．what | B．which |
| C．as | D．that |