I can hardly imagine little children can work out the problem in short a time. A. so; su

问题补充：

I can hardly imagine little children can work out the problem in short a time.

A. so; such

B. such; such

C. so; so

D. such; so

答案：

A. so; such

B. such; such

C. so; so

(答案→)D. such; so

解析：考查so/such的区别，句意：烦我很难想象这么小和孩子能在这么短的时间里面算出这么难的问题。So可以修饰形容词或副词，也可以修饰形容词+冠词+名词，所以第二空填so，或是many/much/few/little(两多两少)+名词，但是第一空后面的little是“小”，所以用such+adj+名词的结构。