Great efforts to increase wheat production must be made if bread shortages ___ avoided.

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• 1.Great efforts to increase agricultural production must be made if food shortage ____ advoided.A.is not to be B.can not be C.has not been D.will not be2.I____ my son_____ doctor,but he wasn't good enough at science.A.hoped; turned B.hoped; could became C.had hoped; would turn D.had hoped; would have become3.- Could you take a message for Mr.Green?-Certainly.I ___ him about something else in any case,so it _____ any bother.A.may see; isn'tB.see; won't
• Great efforts to increase agricultural production must be made if food shortage________avoided.
• 1.Great efforts to increase agricultural production must be made if food shortage ____ advoided.
• Great efforts to increase wheat production must be made if bread shortages ___avoided.
• 1、Greater efforts to increase agricultural production must be made if food shortage _____ avoided.
• Greater efforts to increase agricultural production must be made if food shortage _____ avoided.
• Great efforts to increase wheat production must be made if bread shortages ___ avoided.
• only in this way hoped to make progress with your english.
• 零向量与零向量的数量积有没有意义