Band 4+: Your company is hosting a celebratory event to mark its anniversary and you wish to invite a key client. Write a letter to the client inviting them to the event. You should include details about: - the purpose of the event and its significance - the date, time, and location of the event - why you would like them to attend this special occasion.

The letter addresses all three bullet points required by the task. The purpose, date/time/venue, and confirmation/dress code are all included. However, the response is somewhat brief and lacks the professional depth expected when inviting a 'key client.' While the tone is friendly, it borders on being too informal for a business relationship (e.g., 'Take care'). To improve, expand on the details to make the invitation more engaging. For example, instead of just listing activities, you could describe the atmosphere. Additionally, ensure there is a clear deadline for the RSVP to fully satisfy the requirement of explaining 'how' they should confirm attendance. The letter falls short of the required 150 words.

The letter follows the required structure and addresses all bullet points from the task. However, the progression of ideas feels somewhat abrupt. The sentences are very short and 'choppy,' which prevents a smooth flow of information. To improve, try using cohesive devices (e.g., 'In addition to the dinner, we have planned...') and combining short sentences to create a more natural rhythm.

The vocabulary used is basic and functional, which is sufficient to convey the message but lacks the sophistication expected for a professional invitation. There is some repetition of simple words. To improve, aim to use more varied and formal vocabulary appropriate for a business context, such as 'cordially invite you' instead of 'I would love for you to join us,' or 'festivities' instead of 'games, music, dance'.

The letter relies almost exclusively on simple sentence structures. While the meaning is clear, there are several grammatical issues, such as missing articles (e.g., 'the venue is JN Hall') and awkward phrasing (e.g., 'inform that our company celebrates an annual end-of-year celebration'). Additionally, there are minor punctuation errors, such as spaces before commas. To improve, practice using complex sentence structures (subordinate clauses) and ensure that articles (a, an, the) are used correctly.