Tomorrow, I will have a test of accounting at my/the university. Tomorrow, I will have a test of accounting at my/the university.

Tomorrow, I will have a test ofn accounting test at university. Tomorrow, I will have an accounting test at university.

Tomorrow, I will have a test ofn accounting atest at my university. Tomorrow, I will have an accounting test at my university.

Technically correct, but a more natural way to say it would be "accounting test".

Tomorrow, I will have a test ofn accounting at the university. Tomorrow, I will have a test on accounting at the university.

Tomorrow, I will have a test ofn accounting at university. Tomorrow, I have a test on accounting at university.

When talking about an academic test we generally say it is a "test on [subject]" - eg: "a test on literature" or "a test on mathematics". You could alternatively state the topic first like "an accounting test" or "a literature test" etc. "will" here isn't really needed and almost makes it sound like it's your choice to have the test

Tomorrow, I will have a test ofn accounting atest at the university. Tomorrow, I have an accounting test at the university.

Tomorrow, I will have a test ofn accounting (exam/test) at university. Tomorrow, I will have an accounting (exam/test) at university.

Important tests carried out for academic or certification purposes are usually referred to as exams, which is a more specific word than test. Test isn't wrong either, I just think most people will use the more specific word where it's available.

AMERICAN ENGLISH: Tomorrow, I will havtake a test ofaccounting test at my university. BRITISH ENGLISH: Tomorrow, I will sit a accounting atest at my university. AMERICAN ENGLISH: Tomorrow, I will take a accounting test at my university. BRITISH ENGLISH: Tomorrow, I will sit a accounting test at my university.

The test will be held in theduring my first period, so I will go to bed early rather than studying until midnight. The test will be during my first period, so I will go to bed early rather than studying until midnight.

"will be during" is a little less formal. I would say during "my first period" because it has a little more context that you are talking about school, specifically your first period of school.

The test will be held in the first period, so I wi'll go to bed early rather than studying until midnight. The test will be held in the first period, so I'll go to bed early rather than studying until midnight.

The original sentence is fine, but "I will" sounds quite strong. You should consider contracting it to "I'll"

The test will be held in the first period, so I will go to bed early rather than studying until midnight. The test will be held in the first period, so I will go to bed early rather than studying until midnight.

The mMost of the content will be consolidated accounting. Most of the content will be consolidated accounting.

You don't need "the" twice.

The mMost of the content will be consolidated accounting. Most of the content will be consolidated accounting.

The mMost of the content will be consolidated accounting. Most of the content will be consolidated accounting.

You don't need "the" here.

The mMost of the content will be consolidated accounting. Most of the content will be consolidated accounting.

The mostbulk of the content will be on consolidated accounting. The bulk of the content will be on consolidated accounting.

Alternatively: "most of the content"

The mMost of the test’s content will be about consolidated accounting. Most of the test’s content will be about consolidated accounting.

The mMost of the content will be consolidated accounting. Most of the content will be consolidated accounting.

The most of the conALSO POSSIBLE: The tenst will befocus on maily consolidated accounting. ALSO POSSIBLE: The test will focus on maily consolidated accounting.