As the twentieth century came to a close，the raw materials for a great national literature were at hand，waiting ______.
| A．to use | B．to be used |
| C．to have used | D．to be using |
Mr. Smith often goes to the park near his house to ____ the pressure of work.
| A．walk off | B．wear off | C．break down | D．burn out |
It was yesterday ____ I saw her and it was almost 10 o’clock ____ she arrived.
| A．when; when | B．that; that | C．when; that | D．that; when |
–Tom, what’s the matter with you? You look so worn out!
--Nothing serious. I ____ my new house all the day and I am afraid I won’t finish until tomorrow afternoon.
| A．have whitewashed | B．am whitewashing |
| C．have been whitewashing | D．shall be whitewashing |
Confronted with the complex international situation, we need a foreign policy that is more ____.
| A．symbolic | B．confidential | C．controversial | D．flexible |
The incomes of skilled workers went up. ____, unskilled workers saw their earnings fall.
| A．Meanwhile | B．Moreover | C．Therefore | D．Otherwise |