Task 1 of the General Training is in the form of letter writing. The candidates are given a problem, and they have to respond with a letter with a certain situation requesting necessary information or explaining a situation. It will take approximately 20 minutes out of the total 60 minutes. The candidates required to write a minimum of 150 words and at most 200 words. It is best to write two main paragraphs of approximately 50-60 words each.
The address is not compulsory unless it is required. Write the background of the letter in the introductory paragraph and the reason why the letter is being written. Write for the intended reader. Using business correspondence language is expected when the candidate is writing a formal letter. It is not appropriate to write in note form or using bullet points, colloquial or slang words.
Start the letter by using a suitable opening phrase and then continued with an explanation of the reason for the letter.
For example:
I am writing to you to let you know that….
I regret to inform you that…
An appropriate ending is important to close a letter. Yours sincerely can be used when the writer already greeted the reader by his or her name.  Whereas Yours faithfully would be suitable to use when the opening of the letter is Dear Sir or Dear Madam.

More FAQ:
*Can I write a sentence in question form in GT writing Task 1?
It is quite acceptable to write a sentence in question form as long as the question is relevant to the topic and is informative. Thus, do not make too many questions in the letter.
*What are the correct layout rules for letter writing?
As the time is limited, it is essential that the candidates layout the correct letter as they write.
After the salutation, leave a single blank.
Use either indentation for the first line of the paragraph or a blank line between paragraphs. Thus, do not mix the methods.
The sign-off line is written on the left side of the page, and then the name written below it.
Example:
Yours sincerely,
Phelia
*What to write in the final paragraph?
The closing or the final paragraph is commonly shorter than the other paragraphs for both the formal and the semi-formal. Sometimes it is only a single phrase, other times the phrase will introduce a further concluding sentence.
For example:
I look forward to hearing from you in the future.
I look forward to your reply. I’m sorry to have caused you any trouble and I trust that you will understand.