2. 外语
  3. 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.

admin2015-03-26  47
问题 Greater efforts to increase agricultural production must be made if food shortage ______ avoided.
选项 A、is to be
B、can be
C、will be
D、has been
答案A
解析 时态题。if从句中的动作还没有发生，只是提出目标。be to do sth．可表示按照计划、约定将要发生的动作，故A正确。will do sth．暗含有主观意愿之意，不符题意。
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