I would appreciate ________ much if you could write to me as soon as possible.

A．that

B．it

C．this

D．what

教材编辑的基本原则是：（）。

A、针对性与实用性原则

B、理论性与实践性原则

C、系统性与科学性原则

D、创新性与新颖性原则

E、生产与实际相结合原则