Put the expressions into the appropriate group.

• Группы
  • Formal style
  • Informal style
• Варианты
  • Sorry, I haven’t written for ages, I’ve been really busy.
  • Best wishes,
  • Keep in touch.
  • Could you give me some information about…
  • Dear Sir/Madam,
  • Dear Sam,/Hi Sam,
  • Yours faithfully/sincerely,
  • I apologise for not getting in contact with you before now.