问题
选择题
I didn't pass the math exam last month. _____, how do you study for a math test? [ ]
A. By accident
B. By mistake
C. By the way
D. By the time
答案
答案：C
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I didn't pass the math exam last month. _____, how do you study for a math test? [ ]
A. By accident
B. By mistake
C. By the way
D. By the time
答案：C