英语单项选择( )I leave all the books here?-No,you shouldn't.You must take them home.

问题描述:

英语单项选择( )I leave all the books here?-No,you shouldn't.You must take them home.
A\should B\can C\must D\need

B为什么???????简单疑问句可用排除法用should不行吗???????要选最佳答案