仿照例句用所给的词汇造句。

例：war, go on, during all those years

       War was going on during all those years.

A. a cold rain, drizzle down, all day yesterday

B. the whole night, the wind, howl like mad

C. in all those days, they, struggle heroically against the fascists (法西斯主义者) 

D. for three weeks, our forces, push forward at a great speed 

根据皮亚杰的观点，可以同时从两个或两个以上角度思考问题，这一特征是儿童认知发展水平达到哪个阶段的重要标志？（）

A.感知运动阶段

B.前运算阶段

C.具体运算阶段

D.形式运算阶段