问题描述:
Many people begin to have health problems___.
A:in their forties B:their fortieth birthday C:forty years old D:over forty
如果选A的话为什么D不对呢?
A:in their forties B:their fortieth birthday C:forty years old D:over forty
如果选A的话为什么D不对呢?
问题解答:
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