I want a piece of paper____A. to write B.writing C.to write on D.writing on.应该选什么?怎样区分?帮我造个句子:为了能完成作业,我没有睡觉。用英语怎么说?Another tradation is to wear scary clothes on Helloween.Sb+be+to+V.+宾语 是什么结构?上面的句子怎样翻译?