由于现实世界中风险因素众多，使用高级风险量化方法时，能比初级方法更有效、更准确，而且不会带来新的风险。（）
参考答案：错
紧线段在（）及以下时靠近中间选择一档。
Lisa, could you tell me ________ yesterday?
A．what did the teacher say
B．what the teacher said
C．what will the teacher say
D．what the teacher will say
