your teacher the problem with learning theoretically and they will help you.A. TellingB

问题补充：

your teacher the problem with learning, theoretically, and they will help you.

A. Telling

B. To tell

C. Tell

D. Having told

答案：

A. Telling

B. To tell

(答案→)C. Tell

D. Having told

解析：句意：理论上，告诉老师你的学习问题，他们会帮助你的。这里使用了固定句型：祈使句+and/or+简单句，所以选C。