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1.        It was an increase in reported cases of malaria along the Gulf Coast that in 1921 led the health authorities’ granting a permit for experimentation with human subjects to the group that later would be called by the name of Unimedco.

(A) authorities’ granting a permit for experimentation with human subjects to the group that later would be called by the name of

(B) authorities’ granting a permit for experimentation with human subjects to the group that later to be called by the name of

(C) authorities’ granting a permit for experimentation using human subjects to the group that later would be called by the name of

(D) authorities to grant a permit for human experimentation to the group later called（D）

(E) authorities to grant a permit for human experimentation to the group that later would be called by the name of

这题答案是D,有一点不明白: experimentation 后一般跟with (longman 上查的), google了一下好像没看到有experimentation to 的用法,这是怎么回事呢

是LED TO DO的搭配～XDF上课是这么讲地。。。

我觉得应该是grant sth to sb.human experimentation 是permit的补充说明，和后面的to the group 没有关系。grant permit to the group.