1. Is John Hajun¡¯s gold friend or silver friend?

He is Hajun¡¯s gold friend.

2. What do you want to do in Yosemite?
I want to go fishing.

3. How many close friends do you have?
I have five close friends.

4. Have you ever been to the States?
No, I haven¡¯t. / Yes, I have. I¡¯ve been to California with my family three years ago.

5. Do you want to go abroad someday to study?
Yes, I do. I want to go to Canada to study English in the future.
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Would you check the questions and answers? Are there any errors?

I don't understand #1.

2 and 3 are fine.

4 -- I'd change "I've been" to "I went" or "I traveled..." (Use the simple past rather than the present perfect since the action did not continue into the present.)

5 is fine.

The questions and answers provided are grammatically correct and do not contain any errors. However, it is worth noting that the spelling of "Hajun" in the first question appears to be inconsistent. In the second question, instead of simply stating "I want to go fishing," it may be clearer to specify that you want to go fishing in Yosemite. Other than these minor clarifications, the questions and answers are accurate.