Listen! Do you hear someone for help?A. callingB. callC. to callD. called

问题补充：

Listen! Do you hear someone for help?

A. calling

B. call

C. to call

D. called

答案：

(答案→)A. calling

B. call

C. to call

D. called

解析：

这题考查现在分词作宾语补足语的用法，hear sb doing，是听到某人正在做某事。hear sb do是听到某人做了某事，hear sb done，听到某人被…,根据句意：听！你听到有人正在求救吗？所以选A。