Many experiments have been done to ___ their purpose.a、achieveb、teachc、proved、make
问题描述：
Many experiments have been done to ___ their purpose.
a、achieve
b、teach
c、prove
d、make
答
答案：achieve 实现，达到。
祝你学习进步，更上一层楼！(*^__^*)
有不会的可以再问我:）
答
A.achieve 意思是“实现”
译为：为了实现他们的目的,他们已经做了许多试验.