Today APEC is playing a more important role in the world stage，______ purpose is to promote economic cooperation in the Asia-Pacific area．
| A．where | B．whose | C．when | D．Which |
Ournew machines are much cheaper to run.
| A．effective | B．efficient | C．energetic | D．enthusiastic |
______ today, he would get there by Friday.
| A．Were he to leave | B．If he had left | C．Did he to leave | D．Had he left |
— Pay you weekly or monthly?
— . Either is OK.
| A．Thank goodness | B．Let’s get going | C．It’s up to you | D．That’s all right |
by the thunder, the little girl dare not sleep in her bedroom.
| A．Frightened | B．Frightening | C．Having frightened | D．Being frightened |
It wasn’t until 1970 the war finally came to an end after seven years of hard fighting.
| A．that | B．before | C．when | D．since |