Sincemanykindsofwildanimalshavebecomeendangerednowadays...

问题详情：

Since many kinds of wild animals have become endangered nowadays, we should do something    ▲    to protect them, for each wildlife has a role to play in nature.

A. in time                 B. in danger              C. in silence

【回答】

 A

知识点：介词和介词短语

题型：选择题