Please correct these sentences

1. Sometimes I donate money to the shelter for homeless animals.
2. A Child-rearing is an endless and difficult marital responsibility.
3. When he was on at the party, he has [or "had"] vomited twice. :((
4. I don't like a the taste of vinegar. I am emphasizing that I hate it! I would say, "I simply abhor the taste of vinegar"
5. One of the benefits of my work, is that I have a easy labor the job is easy. [or "A benefit of my work is..."]
6. I have a good intention quoad??? for my family's members.
7. It is my favorite quote from this poetry book.
8.The content that of the papers is top secret.
9. Modern shampoo damages her hair, her one they became curly.

In addition to Jake's comments and corrections:

3. When he was at the party, he has vomited twice. :((         Do not use the present perfect tense with specific time expressions stating when something happened.   Here, the specific time expression is "When he was at the party."

6.  Maybe you mean "towards".  I'm not sure.   I have good intentions towards my family members.

Please correct these sentences

1. Sometimes I donate money for homeless animals. [1]
2. A child-rearing is a an endless and difficult marital responsibility.
3. When he was on at the party, he has vomited twice. :(( [2]
4. I don't like a the taste of vinegar, I am emphasizing that I hate it! [3]
5. The benefits of my work is that I have a easy labor.
6. I have a good intention quoad family's members. [4]
7. It is my favorite quote from this poetry book.
8. The content that of the papers is top secret.
9. Modern shampoo damaged her hair, her one ends became curly. [5]

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[1] This sentence is grammatically correct. However, it sounds strange to me. As a native speaker, I would probably phrase it like this: "Sometimes I donate money to help homeless animals."

[2] "While he was at..." sounds better to my ear than "when", though both are correct.

[3] "I am emphasizing that I hate it!" is grammatically correct, but not something you would ever say. I might just say "I hate it!" By saying you dislike it twice, it's obvious you are emphasizing your dislike.

[4] What do you mean by "quoad"?

[5] You could just say "hair" in place of "ends" if you prefer.