my mother has gone to Hong Kong.She is going to stay there for -------------------

题目

my mother has gone to Hong Kong.She is going to stay there for -------------------
a.sometime b.some time c.sometimes d.some times
告诉我为什么是这个,我自认为是c,告诉我选这个的原因

答案

b.
some time一段时间和
sometime有朝一日
sometimes有时
some times几次
后三个词义错误