_____ computers are convenient to us in daily life, it may also cause other problems.
| A．Whether | B．Because | C．As | D．While |
________ Yao Ming has retired from the NBA, the pleasure we have got by watching him play basketball at home and abroad will last long.
| A．While | B．When | C．As | D．Since |
The ________ soldier said it was ________ to give up his rest time to save more people caught in the earthquake.
| A．worth; worthy | B．worthy; worthwhile |
| C．worthwhile; worth | D．worthy; worthy |
What shall we use for power when all the oil in the world has ________？
| A．given out | B．put out | C．held up | D．used up |
Don’t ________ more work than you can do, or you will ________.
| A．take over; break in | B．take on; break down |
| C．take over; break off | D．take on; break in |
Experts have found that the disease will lead to a greater increase in the number of sufferers unless ________ seriously when the symptom first appears.
| A．treated | B．to be treated |
| C．being treated | D．be treated |