In the global economy，a new drug for cancer，________ it is discovered，will create many economic possibilities around the world.
| A．whatever | B．whoever |
| C．wherever | D．whichever |
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In the global economy，a new drug for cancer，________ it is discovered，will create many economic possibilities around the world.
| A．whatever | B．whoever |
| C．wherever | D．whichever |
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