—Whatcanwedotosavetheelephants?—Wecan'tbuythings

问题详情：

—What can we do to save the elephants?

—We can't buy things ________ ivory.

A．waited for  B．made of 

C．died from  D．made up

【回答】

B

知识点：动词和动词短语

题型：选择题