According to a UN report, one third of the world population have no ____ to clean drinking water and health care．
| A．means | B．approach | C．channel | D．access |
—Did you return Fred's call?
—I didn't need to ________ I'll see him tomorrow.
| A．though | B．unless | C．when | D．because |
Leave your key with your neighbor ________ you lock yourself out one day.(2012·辽宁)
| A．as long as | B．even though |
| C．in case | D．as if |
A number of high buildings have arisen ________ there was nothing a year ago but ruins.(2012·山东)
| A．when | B．where | C．before | D．until |
—Do you have a minute？I've got something to tell you.
—OK，________ you make it short.
| A．now that | B．if only |
| C．so long as | D．every time |
—Have you got any idea for the summer vacation?
—I don't mind where we go ________ there's sun，sea and beach.
| A．as if | B．as long as |
| C．now that | D．in order that |