Question

【题目】Something must ________to protect the sharks because many of them are endangered now.

A. do B. done C. be done

Answer 1

【答案】C

【解析】

句意：必须采取措施保护鲨鱼，因为现在很多鲨鱼都濒临灭绝。考查被动语态。must do sth. 必须做某事；Something和do之间是动宾关系，故此处使用情态动词的被动语态，其构成为：情态动词+be+done；do的过去分词是done，结合选项可知C选项符合题意，故答案选C。