(2011·临沂模拟) __________ time goes on, people demand better housing and jobs.
| A．When |
| B．While |
| C．As |
| D．Since |
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(2011·临沂模拟) __________ time goes on, people demand better housing and jobs.
| A．When |
| B．While |
| C．As |
| D．Since |
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