My weekend Japanese school conducts a book survey every Jurly so the school can buy new books whichthat the students want. My weekend Japanese school conducts a book survey every July so the school can buy new books that the students want.

My weekend Japanese school conducts a book survey every Jurly so that the school can buy new books whichthat students want. My weekend Japanese school conducts a book survey every July so that the school can buy new books that students want.

"jury" = 陪審 "July" = 7月

Each person can suggest up to 5 books, which means if you have five people in your family, you can suggest up to 25 books at the most, if you want that muchany books. Each person can suggest up to 5 books, which means if you have five people in your family, you can suggest up to 25 books at most, if you want that many books.

Each person can suggest 5 books which means if you have five people in your family, you can suggest 25 books at the most, if you want that muchany books. Each person can suggest 5 books which means if you have five people in your family, you can suggest 25 books at most, if you want that many books.

Since books are countable (i.e. you can have 25 books), we use "many", instead of "much". Something that wouldn't be countable would be e.g. water. You can't say "I have 5 waters", you'd need to say "I have 5 litres of water", so we use "that much water".

I like reading books, so I asked my mum to submite my a book suggestion for me. I like reading books, so I asked my mum to submit a book suggestion for me.

Even though she's submitting it at your request, it's still her suggestion (possession of the suggestion is still hers), so I edited this sentence to reflect that.

I like reading books, so I asked my mum to submite my book suggestion. I like reading books, so I asked my mum to submit my book suggestion.

There is a student in grade 7 who also likes books in grade 7, and she said she was having trouble to chooseing books. There is a student in grade 7 who also likes books, and she said she was having trouble choosing books.

Your wording here is a little ambiguous. The original wording implies you are also in grade 7 and have found another student who likes books. Moving "in grade 7" before "who also..." removes this implication, because "in grade 7" would then modify "a student" directly instead of being attached to the "who also..." fragment. If you intended to imply that you are also a student in grade 7, then the correction would be: "There is another student who also likes books in grade 7, and she said..."

There is a student who also likes books in grade 7, and she said she was having trouble to chooseing books. There is a student who also likes books in grade 7, and she said she was having trouble choosing books.

I like mystery books, especially by Agatha Christie's and Seishi Yokomizo, who is popular novelist in Japan. I like mystery books, especially by Agatha Christie and Seishi Yokomizo, who is popular novelist in Japan.

We more commonly use the preposition "by" here rather than the possessive form in the context of discussing books by their author. We would use the possessive form if you used a form more similar to: "I like Agatha Christie's books."

I like mystery books, especially Agatha Christie's and Seishi Yokomizo who is popular novelist in Japan. I like mystery books, especially Agatha Christie and Seishi Yokomizo who is popular novelist in Japan.

So you can use possessive "Agatha Christie's books", or possessive while omitting the noun "Agatha Christie's", or just the author's name "Agatha Christie" in this circumstance. However, since you listed two authors here, you need to treat both names the same ("Agatha Christie's and Seishi Yokomizo's" OR "Agatha Christie and Seishi Yokomizo"). Since you have the extra clause at the end of Seishi Yokomizo, it would make "Seishi Yokomizo's" sound kind of awkward, so it's better to omit the possessive on both authors names.