C）根据对话内容，从下面方框中选择适当的单词或短语填空，使对话内容完整正确。

Tom： I give up! I____ can't learn English!
Amy:  Why do you say that? I think you are making a lot of____ .
Tom:  No, I'm not. I try and try and I still can't speak it very well.
Amy:  Learning any language ____  a lot of effort. Please don't give up.
Tom:  Amy, I know you always____ English. Can you offer me some valuable advice?
Amy:  Listening to English tapes and watching English movies may be helpful. But always remember your English will improve if you are really____ it.
Tom:  Good idea. I will try to love English.

工业革命促进了世界市场的形成，统一的世界市场基本形成于（    ）

远道而来的欧洲殖民者在屠杀印第安人的同时，抢占他们的家园，掠夺他们的财产。残酷的历史现象对欧洲社会产生的重大影响是（　　）​