— You have helped me a lot. I can’t thank you enough.—.A. Be my guest.B. That’s right.C. I

问题补充：

— You have helped me a lot. I can’t thank you enough.

—.

A. Be my guest.

B. That’s right.

C. I don’t think so.

D. Think nothing of it.

答案：

A. Be my guest.

B. That’s right.

C. I don’t think so.

(答案→)D. Think nothing of it.

解析：考查交际用语。A请自便；B那是对的；C我不这么认为；D没关系；句意：—你帮助我这么多！我再怎么感谢你也不为过。—没关系的。根据句意可知D项是回答对方的感谢，故D正确。