Mr. Li _____Kunming . He _____ the city three times . This time he _____ Kunming for three days .
| A．has been to, has gone to , have been in |
| B．has gone to , has been to , has been in |
| C．has been in , has been to , have gone to |
| D．has gone to , has been in , has been to |
There's no way of knowing why the man fails，____ he is always hard-working and wise．
| A．when | B．although |
| C．if | D．unless |
--Shanghai Pudong Airport please! I must get there by 7．
--____，but I'll try my best．
| A．No problem | B．All right |
| C．I can't promise | D．I can't do that |
The research group ____ 15 members has made great achievements in recent years．
| A．is made up of | B．makes up |
| C．made up of | D．making up of |
When the star fell ____ the darkness quickly at night，all the people felt it amazing．
| A．down | B．off |
| C．behind | D．through |
It's an either-or situation．You can watch TV or play games，but you can't do ____．
| A．others | B．either |
| C．another | D．both |