What is the meaning of 'He's such a party pooper! ' Thank you.

Suggested English phrases from a British Council teacher

What do you think? The teacher suggests that we use the sentences with 'Yes' below:

<font size="2" class="gmail_msg"><em class="gmail_msg">(Too standard)
</em>NO--With reference to your letter dated 8th November 2015, .....
YES--Thank you for your letter of 8 November 2015.</font>

<font size="2" class="gmail_msg">NO--Attached herewith, a copy of the contract duly completed for your retention. 
YES--I have attached a completed copy of the contract. </font>

<font size="2" class="gmail_msg">NO--The matter will be investigated in due course. 
YES--We will certainly look into this complaint and get back to you by Monday. </font>

<font size="2" class="gmail_msg"><em class="gmail_msg">(Too direct)
</em>NO--How do you expect us to send you the forms you requested if you omitted the identifying numbers? 
YES--If you will send us the form numbers, I will be glad to send you all the papers you requested. </font>

<font size="2" class="gmail_msg">NO--Kindly return the attached report by the end of today. 
YES--Do you think you could return the attached report by the end of today? </font>

Thank you for your corrections. 1. As you know, our graduation cocktail event is quickly approaching. I would like to thank you all for your efforts and assistance in making this happen. We wish you great success next Tuesday. 2. We hope that the event is a fruitful and joyful experience for you all.

Seek your help. Is this sentence correct? Ken has a great level of Mandarin and with more practice will become fluent.

How to write post-event editorials? 1. Attendees demonstrated keen and deep interests with in-depth questions. 2. The trainer shared tips on resume & cover letter writing, strategy to fast track, connecting with the banking people and how to shine at the interview. Attendees were eager to learn how to demystify banking professions. Non-stop questions were asked on the 'how to'. The session definitely boosted the confidence of our attendees to apply for jobs at international banks.

Are these well written sentences? 1. The highly anticipated annual conference was held on December 20, 2016. 2. Participants that joined the event gain insightful information on cosmetics products.

The participants raised their glasses for a toast. Is it common to say so? How to write this in a better way? Thanks

'I rate xxx's lesson very highly.' Is this sentence correct? ThanksIndeed, I think the sentence is a bit strange but doesn't know how to correct it.