Dear Mr. Robert,

I am writing to submit the homework of this week. Attached is the homework file and my student information. If there is any more information needed, please inform me so that I can give it to you.

Besides, I would be very grateful if you can help me clarify the fourth idea of the last lesson: "the world is facing up with the problem of visual pollution". Could you explain more about visual pollution?

I am looking forward to your response.

Regards,

Linh Nhi