Mr. Green I think physics is too difficult for me.-Tom work hard you’ll find it

问题补充：

--- Mr. Green, I think physics is too difficult for me.

---Tom, work hard, you’ll find it not as difficult.

A. or

B. but

C. so

D. and

答案：

A. or

B. but

C. so

(答案→)D. and

解析：考查情景交际和祈使句。“格林先生，我认为物理对我来说太难了。”“汤姆，努力学习，你就会发现他并不难。”祈使句+and相当于if条件句，翻译为“如果......，就会......。”用or的话，表示的是不好的结果。故选D。