◎ 题干
If you come,you must be prepared to keep moving,______ it is too cold to stand and watch for long.
[     ]
A.as  
B.when
C.if  
D.unless
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“If you come,you must be prepared to keep moving,______ it is too cold to stand and watch for long.[ ]A.asB.whenC.ifD.unless…”主要考查了你对  【从属连词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。