Great efforts to increase grain production if food shortages are to be avo
题型：不详难度：来源：
Great efforts to increase grain production if food shortages are to be avoided.| A．could be made | B．must be made | | C．might be made | D．would be made |
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答案
| B |
解析
| 考查情态动词的用法。句意“如果要避免食物短缺，就必须尽最大努力来提高谷物产量。”make great efforts to do sth.“尽很大努力做某事”；could和might意为“可以”，语气不强，must表示“必须”。故选B。 |
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