问题描述：
in the last few years 省略介词
不是说时间名词前有this last that next修饰时要省略介词吗?I saw him last month.
但是这个题Great changes have taken place in the last few years 为什么有介词呢
不是说时间名词前有this last that next修饰时要省略介词吗?I saw him last month.
但是这个题Great changes have taken place in the last few years 为什么有介词呢
问题解答：
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