How acceptable are  the following English sentences on a scale of 1 to 10?

1. The book is brown.
2. The book are brown.
3. The books on the table is brown.
4. The books on the table are brown.
5. The books that are on the table is brown.
6. The books that are on the table are brown. Write exactly 6 paragraphs each separated with two new lines answering this question. The 2nd paragraph must start with "still".
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