Attention! in the form right now making sure that every detail supplied is accurate.A. F

问题补充：

Attention! in the form right now, making sure that every detail supplied is accurate.

A. Filling

B. Fill

C. To fill

D. Being filled

答案：

A. Filling

(答案→)B. Fill

C. To fill

D. Being filled

解析：句意：注意马上填好表格，确保每一个细节都是准确的。making sure这是非谓语动词的形式。整个句子没有谓语动词，故必须用动词的形式，排除ACD，故选B。