◎ 题干
The group of students went to the suburb, did some research work, and ________ the water
in the river    to see if it had been polluted.
[      ]
A. proved          
B. boiled          
C. tested          
D. exchanged
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“The group of students went to the suburb, did some research work, and ________ the water in the river to see if it had been polluted.[ ]A. provedB. boiled C.…”主要考查了你对  【动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。