Read the sentences and tick more formal ones.

Which one is more formal?

• I want to say sorry for being so late.
• I apologise for being so late.

Which one is more formal?

• It was a great pleasure for me to talk to you during the conference. I am looking forward to meeting you next month.
• I was happy to talk to you during the conference. Hope to meet you next month.

Which one is more formal?

• Let me remind you that the exam will take place on the 21st of March in the room 309.
• Don't forget that the exam will be on March 21st in room 309.

Which one is more formal?

• Do you need my help?
• Would you like me to help you?

Which one is more formal?

• Could you inform us when you know the news?
• Let us know when you have any news.

Which one is more formal?

• Is it OK if I open the window?
• Would you mind if I open the window?

Which one is more formal?

• We strongly recommend you to attend this meeting to get all the information first.
• You'd better come to this meeting to know everything first.