--- Does your sister work in the company?
--- No, not now. But she ______ there for 8 years.
| A．has worked | B．worked | C．had worked | D．were working |
From facts，scientists have ________that more energy is being absorbed from the sun，throwing the earth's energy “out of balance”．
| A．confirmed |
| B．concluded |
| C．concentrated |
| D．centered |
A number of students ________the exam so far，but the number of the students who failed ________great.
| A．passed；were |
| B．has passed；are |
| C．have passed；is |
| D．have passed；are |
The traditional ____________to dealing with complex problems is to break them down into smaller，more easily managed problems.
| A．approach |
| B．concept |
| C．belief |
| D．wisdom |
The English test was so easy that most of the students had no ________finishing it in given time.
| A．difficult |
| B．question |
| C．bother |
| D．time |
Many people ________in old days.
| A．starved to death |
| B．starved into death |
| C．was starved to death |
| D．was starved |