North Korea threatens to ________ from six-party talks aimed at ending North Korea's nuclear program unless its proper rights are to be satisfied．
| A．escape | B．flee | C．withdraw | D．retire |
I sent the letter early that morning _______ she got it that afternoon.
| A．in order that | B．so that | C．for purpose that | D．in order for |
______ did it , I didn’t.
| A．Who | B．Whoever | C．No matter whom | D．No matter when |
_______I know , the computer can never take the place of the human brain.
| A．As for | B．As long as | C．So far for | D．So /As far as |
I paid only 5 pounds for the book , _______I expected it would cost.
| A．not as many as | B．not so much as |
| C．cheaper than | D．not so expensive |
_______ you have got used to it , you’ll like it .
| A．While | B．On the condition | C．Once | D．Unless |