问题
选择题
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
答案：D
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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：D