The conference had been held to discuss the effects of tourism the wildlife in the area.
| A．in | B．on | C．at | D．with |
The doctor told him that it would be at least three more months ______ he could be released from hospital.
| A．when |
| B．before |
| C．since |
| D．that |
If I hadn't stood under the ladder to catch you when you fell, you ______ hospital now.
| A．would be |
| B．could have been |
| C．was |
| D．will be |
--- Many years has passed since I last saw you. I didn't recognize you at first.
--- I , either, if someone hadn't called you by name．
| A．wouldn't have |
| B．wouldn't |
| C．didn't |
| D．hadn't |
According to the timetable,the next flight is here at 12 : OO, butthe awful sandstorm, the whole airport has been closed.
| A．due; due to |
| B．arriving; for |
| C．likely; because |
| D．due to; because |
It we had cooperated for a couple of weeks.I realized we had a lot in common.
| A．was until; when |
| B．was until; that |
| C．wasn't until; when |
| D．wasn't until; that |