想了解未来的手机，你可以去日本；想了解宽带互联网的影响，你可以去韩国。

To see the future of mobile phones, people look to Japan; to see the impact of broadband Internet connections, they look to South Korea.

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如果你喜欢购物，你可以选择去日本旅游。

If you like shopping, you may choose to travel to Japan.

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You could use "I've already" pattern to explain why you don't want to go to Japan again.

你可以用“I've already”句型来解释你为什么不想再去日本了。

I've already 课堂 - SpeakingMax英语口语达人