it's is Saturday today.There's no teacher at school.So I ( ) go to school

问题描述:

it's is Saturday today.There's no teacher at school.So I ( ) go to school
A mustn't B don't need C don't have to D should

正确答案C 客观上不需要
A 表示主观上不需要那为什么不选B也有主观的意思,我没必要