in a long queue we waited for the store to open to buy a New iPad .A. Standing B. To sta

问题补充：

in a long queue, we waited for the store to open to buy a New iPad .

A. Standing

B. To stand

CStood

D. Stand

答案：

(答案→)A. Standing

B. To stand

C. Stood

D. Stand

解析：考查非谓语动词。非谓语动词短语后有逗号，说明非谓语动词做题干的状语，逻辑主语是句子的主语we，非谓语动词与逻辑主语是主动关系，且其动作与谓语动词wait的动作同时进行，用动词v-ing的一般式，选A。