Athens __________ the birthplace of western civilization.
| A．are known as | B．is known as |
| C．are known for | D．is known for |
Children under six are not __________to school except those of extraordinary intelligence.
| A．permitted | B．admitted | C．accepted | D．received |
He was so____ a key university that he would work until late into the night.
| A．curious about | B．anxious about | C．desperate for | D．concerned about |
They also agree that it is the burning of more and more fossil fuels that has resulted ____ this increase in carbon dioxide.
| A．from | B．of | C．in | D．to |
____ late in the morning, Bob turned off the alarm.
| A．To sleep | B．Sleeping | C．Sleep | D．Having slept |
It is only when the disease has progressed to the AIDS ____ a person begins to look sick.
| A．which | B．what | C．who | D．that |