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______he come late, give him the message.A.HadB.ShouldC.WouldD.If
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【C5】A.should notB.mustC.might notD.could
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【C9】A.couldB.shouldC.mayD.must
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______it rain, the crops would be saved.A.ShallB.ShouldC.WouldD.May
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【C6】A.wouldB.shouldC.mustD.might
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【C5】A.willB.shouldC.canD.would
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normative study和descriptive study的关系是()。A.can implies oughtB.规范从事实中来C.事实从