单项选择：Look at the boy running on the playground.Is it David?It __be him .I saw him go to the teachers'office just now.A must B can't C could D might选那一个
问题描述：
单项选择：Look at the boy running on the playground.Is it David?
It __be him .I saw him go to the teachers'office just now.
A must B can't C could D might选那一个
答
B选项，笨鸟说的完全正确！
答
D,表猜测语气较弱
答
B 都说看见他去老师办公室了 所以那个人不可能是他 选can't