Only after the woman had her own child ________ how difficult it was to be a mother.
| A．she realized | B．had she realized |
| C．she had realized | D．did she realize |
31. Nobody believed his reason for being absent from the class ______ he had to meet his uncle at the airport.
| A．why | B．that | C．where | D．Because |
30. People ran out __________ as fire tore through the building.
| A．with vain | B．in rags | C．with one voice | D．with fear |
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 |