________that between 2000 and 2020，over 68 million people will die of AIDS in the countries most affected by epidemic.
| A．What is estimated |
| B．As we estimate |
| C．It's estimated |
| D．It estimates |
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________that between 2000 and 2020，over 68 million people will die of AIDS in the countries most affected by epidemic.
| A．What is estimated |
| B．As we estimate |
| C．It's estimated |
| D．It estimates |
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