问题
选择题
I simply couldn't understand how it _____ that you did so much work within such a short time.[ ]
A. came about
B. came back
C. came up
D. came along
答案
答案：A
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I simply couldn't understand how it _____ that you did so much work within such a short time.[ ]
A. came about
B. came back
C. came up
D. came along
答案：A