Staff are allowed to take a ten-minute break every two hours to relax, use the bathroom or do else is necessary.
A. something
B. anything
C. whatever
D. what
网友回答
A. something
B. anything
(答案→)C. whatever
D. what
解析：如果把is necessary 去掉，倒是可以用something。但是很显然这是名词性从句中的宾语从句，只有C、D是关系词，选择C，做任何有必要做的事情。