Scientists say it may be five or six years ______ it is possible to test this medicine on human patients.
| A．before | B．after | C． since | D．when |
The shooting centre is about 50 kilometers ______Beijing.
| A．south of | B．in south of |
| C．the south of | D．southern of |
First impressions are the most lasting. After all, you never get ______second chance to make ______ first impression.
| A．a; the | B．the; the | C．a; a | D．the; a |
________, I have never seen anyone who’s as capable as John.
| A．As long as I have traveled |
| B．Now that I have traveled so much |
| C．Much as I have traveled |
| D．As I have traveled much |
With the popularity of the Internet banking, it is becoming more convenient to ________ a business credit card for personal use online.
| A．apply for | B．look for |
| C．pay for | D．search for |
Since the couple were laid off, the ________ of their family have become worse and worse.
| A．setting | B．environment |
| C．circumstances | D．surroundings |