---What do you think of this maths problem? Is it too hard?----Not .A. at allB. in allC. f

问题补充：

---What do you think of this maths problem? Is it too hard?----Not .

A. at all

B. in all

C. for all

D. all

答案：

(答案→)A. at all

B. in all

C. for all

D. all

解析：问句的意思是：你觉得这知道数学题怎么样？太难吗？这里用not at all意思是：一点不难。