These students will graduate from college next summer, by which time they
in college for four years.
| A．have studied | B．had studied |
| C．will have studied | D．will be studying |
28. The people had to _______ the new rulers when they lost the war.
| A．take to | B．cater to | C．submit to | D．lead to |
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 |