题文
If nothing________，the oceans will turn into fish deserts. (2013·湖南，26)
| A．does | B．had been done |
| C．will do | D．is done |
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If nothing________，the oceans will turn into fish deserts. (2013·湖南，26)
| A．does | B．had been done |
| C．will do | D．is done |
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