Something _____ wrong with the machine, and it _____ not work. [ ]

A. being; could

B. going; should

C. were; might

D. went; would

从皮亚杰对儿童思维的分析可以看出，儿童的思维特征是（）

A.具体形象性

B.单一性

C.低级性

D.同一性

E.生命性