◎ 题干
The baby is generally healthy, but every now and then he ______ a cold.
[    ]
A. has caught                  
B. is catching
C. caught                  
D. does catch
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The baby is generally healthy, but every now and then he ______ a cold. [ ]A. has caughtB. is catching C. caught D. does catch…”主要考查了你对  【强调句】  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。