)You can give the document to is in the office.However to require a written paper for it.

问题补充：

)You can give the document to is in the office.However, to require a written paper for it.

A. who;make sure

B. whom;making sure

C. whomever;be sure

D. whoever;be sure

答案：

A. who;make sure

B. whom;making sure

C. whomever;be sure

(答案→)D. whoever;be sure

解析：考查名词性从句。whoever引导宾语从句，在从句中作主语;be sure开始一个祈使句。