They are looking forward to from you.A. hear B. heardC. hearing

问题补充：

They are looking forward to from you.

A. hear B. heardC. hearing

答案：

解析：句意：他们正盼望着收到你的来信呢。短语look forward to盼望，to是介词，后面接名词或者动名词作宾语，故选C。