We don't doubt ________ the boy can ________ the angry teacher.[      ]

A. if; apologize for         

B. whether; apologize to

C. that; apologize to       

D. what; apologize

我国专利法规定，实用新型专利申请人应当向国务院专利行政部门提交的申请文件有（）

A.请求书

B.说明书

C.摘要

D.权利要求书

E.附图