The population_very fast_four hundred years.

问题描述:

The population_very fast_four hundred years.
A grew,in the past B grew,for the past C has grown,in the past D has grown ,last
答案给的是C,为什么啊==

首先,第二个格字,in the past ,是完成时的提示词,因此前面就用完成时,has grown,同时排除AB,的 for the past 400 years,就错的,要么是for 400 years,要么是since past 400 years ago,同时,也是完成时的提示词D 的las...但是不是 for the past+时间段,表示在过去的……时间里,last|in the past+时间段,用与现在完成时么==for the past 400 years,没错,我一开始把past 看成了last 正因为要用完成时,可是B 用了过去式,所以B 才错