On the National Day up into the air. Then the crowed cheered.A. the balloons wentB. went

问题补充：

On the National Day, up into the air. Then the crowed cheered.

A. the balloons went

B. went the balloons

C. go the balloons

D. did the balloons go

答案：

A. the balloons went

(答案→)B. went the balloons

C. go the balloons

D. did the balloons go

解析：句意：在国庆节，气球飞上天空，然后人群欢呼起来。这里是方位副词up提前，而且主语是名词的时候，句子用完全倒装句式。谓语动词提到主语前面，还原后是：the balloons went up into the air.所以选B。