Most state constitutions now mandate that the state budget be balanced each year. A: mandate that the state budget be balanced B:mandate the state budget to be balanced C:mandate thate the state budget will be balanced D:have a mandate for a balanced state budget E:have a mandate to balance the state budget 我的问题是为什么B不对。如果用虚拟语气当然A没错，可以用不定式又有什么问题呢 | 
