问题
选择题
-Why are you walking to school?
-______ the bus broke down on the 
way. [ ]
A. If
B. Since
C. Because
D. Though
答案
答案：C
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-Why are you walking to school?
-______ the bus broke down on the way. [ ]
A. If
B. Since
C. Because
D. Though
答案：C