It is Tu Youyou ________was presented the 2011 Lasker Clinical Medical Research Award on September 12.
| A．what |
| B．that |
| C．when |
| D．which |
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It is Tu Youyou ________was presented the 2011 Lasker Clinical Medical Research Award on September 12.
| A．what |
| B．that |
| C．when |
| D．which |
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