1. What was your parents' dream?

1-1. They all wanted to be a singer.
1-2. They all wanted to be singers.
(Which answer is correct? Do I have to use a singular noun or a plural noun?)

2. What did you give to your parents on Parents' Day?
2-1. I gave them a flower.
2-2. I gave them each flower.
2-3. I gave them flowers.
2-4. I gave them some flowers.
(Which answer is right? )

3. You can go back home tomorrow afternoon after class. We are going to play soccer with co-workers on the playground. Don't forget to bring sneakers and sports clothes (upper sports clothes and lower sports clothes). We will have a soccer game with other members in the playground.
It seems that it will be warmer tomorrow. However, it is not so hot, so we can enjoy playing soccer together.

(Would you like to check the passage? Correct the errors,please.)

1-1 You could say "They each wanted to be a singer" (each is singular and so is singer)

1-2 is better than 1-1 as you have it.

2-2 = I gave them each a flower. OR I gave each of them a flower.
The rest are fine.

"on the playground" but I'm not sure what "upper sports clothes and lower sports clothes" really means. (shirts and pants/trousers?)

Sra

1. Both answers can be correct, depending on the context.

- If each of your parents individually wanted to be a singer, then you would use the plural form "They all wanted to be singers."
- If your parents collectively shared the same dream of being a singer, then you would use the singular form "They all wanted to be a singer."

2. All of the answers are grammatically correct, but they have slightly different meanings:
- "I gave them a flower" (singular) implies that you gave one flower to your parents collectively.
- "I gave them each flower" implies that you gave multiple flowers, with each parent receiving one flower.
- "I gave them flowers" (plural) implies that you gave multiple flowers to your parents collectively.
- "I gave them some flowers" (the use of "some" implies an indefinite quantity) also implies that you gave multiple flowers to your parents collectively.

3. The passage seems to be well-written and does not contain any grammatical errors. However, if you want to make it more concise, you could consider the following changes:
- Instead of saying "upper sports clothes and lower sports clothes," you can simply say "sports clothes."
- Instead of saying "We will have a soccer game with other members in the playground," you can rephrase it as "We will play a soccer game with other members in the playground."
- Instead of saying "It seems that it will be warmer tomorrow," you can simplify it by saying "Tomorrow will be warmer."