问题
单项选择题
（）we stand away from the church bell, it takes time for the sound waves to reach us.
A.If
B.Whenever
C.Because
D.Where
答案
参考答案：C
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（）we stand away from the church bell, it takes time for the sound waves to reach us.
A.If
B.Whenever
C.Because
D.Where
参考答案：C