问题
单项选择题
There have been many（）in their marriage but they still love each other.
A.ups and downs
B.from head to toe
C.time and again
D.over and over
答案
参考答案：A
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There have been many（）in their marriage but they still love each other.
A.ups and downs
B.from head to toe
C.time and again
D.over and over
参考答案：A