在作者看来，外国人是提高你英语口语的“机会”；每当你见到外国人，不论美国人还是英国人，你应该和他或她练习说英语。

In the writer's opinion, foreigners are an "opportunity" to improve your oral English; whenever you see a foreigner, American or English, you should practise speaking English with him or her.

youdao

你想提高你的英语水平吗？

Do you want to improve your English?

youdao

你是怎样提高你的英语发音的？

How do you improve your English pronunciation?

youdao

Do you think your English has improved a lot since you came to London?

自从你来伦敦后，你觉得你的英语提高了吗？

学习英语的理由 - SpeakingMax英语口语达人

Can you give us some tips on how to improve our English?

你能给我们一些提高英语的建议吗？

如果想提高英语水平 - SpeakingMax英语口语达人

You have many students who have improved their English skills a lot.

你很多学生的英语技能都大幅度提高了。

留在记忆中的学生 - SpeakingMax英语口语达人