His father disappeared, ________ two children and never _______ from again.
| A．left; being heard | B．leaving; heard | C．left; be heard | D．leaving; to be heard |
27. 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 |
26. 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 |
25. ----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 |
31. 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 |
23. 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 |