◎ 题干
Jack wasn’t saying anything,but the teacher smiled at him _______he had done something very clever.
[     ]
A.as if  
B.in case
C.while  
D.though
◎ 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“Jack wasn’t saying anything,but the teacher smiled at him _______he had done something very clever.[ ]A.as ifB.in caseC.whileD.though…”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。