单选题 ______ give your homework to Amy? She is going to teachers' office.
A. Why B. Why not C. Why don't D. Why didn't

【正确答案】 B
【答案解析】[解析] 习惯用法题。why not，位于句首，表示建议、意见。Why not=Why don't you，选项[C]中缺少个you，因此只能选择选项[B]。