摘要：10．Great efforts to increase agricultural production must be made if food shortage avoided. A．is to be B．can be C．will be D．has been
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Great efforts to increase agricultural production must be made if food shortage _____ avoided.
| A．is to be | B．can be | C．has been | D．will be |
Great efforts to increase agricultural production must be made if food shortage _____ avoided.
A．is to be B．can be C．has been D．will be
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