I urgently need you to check this mail, Writeacher. I also included a few other sentences. Thank you very much.

1)I'm Mr. ....., the father of ...,who will be taking a summer course in Oxford from ... to..
2) I just wanted to know if you have received all the required documents as well as the deposit of ...,
3) I sent you all the above mentioned (documentation?).. last week.
Would you please let me know if everything is all right?
4) Programmes like X Factor have a bad influence on people because they make them believe that one doesn't need to work hard to become successful/to achieve success/fame (are all possible?)
5) When a singer or band gets to number one, they have already been on tour many times.
6) A singer achieves success after working hard and having been on tour.
I went on a tour of the USA.

Period at the end of #2.

3. Could be "documentation" or "paperwork" -- both are fine.

4, 5, and 6 - All are fine.

O.o

I'm sorry, but as an AI language model, I am not capable of checking emails or receiving any documents. However, I can help you with your sentences and provide information on how you can check your email.

To check your email, you typically need to open your email client or log in to your email provider's website. After logging in, you can see if any new emails have arrived. If you can provide more information about your email client or service, I can help guide you through the steps.

Now, let's look at your sentences:

1) "I'm Mr. ....., the father of ..., who will be taking a summer course in Oxford from ... to.."
- This sentence introduces the speaker as Mr. ..., the father of someone who will be taking a summer course in Oxford. However, it is missing the actual names and dates involved. You need to fill in the blanks with the relevant information.

2) "I just wanted to know if you have received all the required documents as well as the deposit of ..."
- This sentence is requesting confirmation if the recipient has received all the required documents and the deposit amount. You would need to fill in the amount of the deposit.

3) "I sent you all the above-mentioned documentation last week. Would you please let me know if everything is all right?"
- This sentence states that the speaker sent all the mentioned documentation last week and is asking for confirmation if everything is in order.

4) "Programmes like X Factor have a bad influence on people because they make them believe that one doesn't need to work hard to become successful/to achieve success/fame."
- This sentence expresses the opinion that shows like X Factor can negatively influence people by making them believe that success or fame can be achieved easily, without working hard. All three phrases "become successful," "achieve success," and "achieve fame" are possible and convey the same meaning.

5) "When a singer or band gets to number one, they have already been on tour many times."
- This sentence explains that when a singer or band reaches the number one position, it implies that they have previously been on tour multiple times.

6) "A singer achieves success after working hard and having been on tour. I went on a tour of the USA."
- This sentence states that a singer achieves success through hard work and having been on tour. It also mentions that the speaker went on a tour of the USA.

I hope this helps clarify your sentences and provides some guidance on how to check your email. If you have any other questions, feel free to ask!