It was not until one night_____we were doing our cleaning-up I got curious and wanted to see what was on the top floor．
| A．that；that | B．when；so | C．that；because | D．when；that |
People have become aware ______the fact that carbon dioxide, poison to the environment, contributes_____ air pollution.
| A．of, to | B．/, to | C．of, of | D．of, for |
Geldof intended the concert ________money for those suffering from the earthquake, which_______ 2000 lives.
| A．to maintain, claimed | B．to raise, claimed | C．to collect, killed | D．to raise, kill |
---Do you enjoy your stay in here?
----Yes. A beautiful autumn day ___________ the wet summer we have had.
| A．became aware of | B．took advantage of | C．accounted for | D．compensated for |
George ___ the good chance to present his proposal to the director, and at last, it was adopted.
| A．realized | B．seized | C．delivered | D．released |
The government have realized the use the returnees make ______ the experience and skills ________while living abroad.
| A．of, gained | B．of, gain | C．for, gained | D．up, gain |