needn'tdo和dontneedtodo希望得到详细的语法解答!题目是这样的：Weneedsomecakesforpicnic.划线提问somecakes_____________weneedforpicnic?2根横线填什么?whatfood?还是whichfood?还是whatdo?然后把题目

　　needn'tdo和dontneedtodo希望得到详细的语法解答!

　　题目是这样的：Weneedsomecakesforpicnic.划线提问somecakes

　　_____________weneedforpicnic?

　　2根横线填什么?whatfood?还是whichfood?还是whatdo?

　　然后把题目原句改成否定句和一般疑问句怎么改?wedon'tneed还是weneedn't?

　　我们需要读一些书翻译是：Weneedreadsomebooks还是Weneedtoreadsomebooks?