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【118.Greatereffortstocontrolthepopulationmustbemadeiffoodshortage__________avoided.A.istobeB.canbeC.willbeD.hasbeenistobe】
题目内容：
118.Greater efforts to control the population must be made if food shortage __________ avoided.
A.is to be
B.can be
C.will be
D.has been
is to be优质解答
将来时的被动语态
如果要避免粮食短缺,就一定要付出更大的努力来控制人口.
A.is to be
B.can be
C.will be
D.has been
is to be
优质解答
如果要避免粮食短缺,就一定要付出更大的努力来控制人口.
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