Foreign visitors can get a bit confused because there are too many customs in this country. Corrected word: confused (adjective)

In our country, we have a time-honored tradition of worshipping our national heroes and ancestors. Corrected phrasing: "a time-honored tradition of" is more natural.

You mustn't tell anyone what I have just told you; it's a secret between you and me only. Corrected preposition: "between" is used to indicate a relationship between two people.

There were many more people joining the annual festival than I had thought at first. Corrected phrase: "many more" is the correct comparative form.

When we turned 16 years old, our parents started to allow us to go out at night until 10. Corrected verb form: "to go out" is the correct infinitive form.

It's not convenient to send a letter from my village since the nearest post office is miles away. Corrected sentence structure: The original sentence was grammatically incorrect. This revised sentence expresses the intended meaning.

There is a spectacular evening firework show with music and a laser show in addition to live entertainment. Corrected preposition: "in addition to" is the correct phrase to indicate extra elements.

Though I was in England at that time, I was not able to enjoy the Glastonbury Festival. Corrected verb phrase: "was not able to" is the correct negative form.

Our country does not have many carnivals; however, we have many traditional festivals. Corrected conjunction: "however" is used to contrast the two statements.

If you think that the task is going to be easy, then you had better think again. Corrected phrase: "think again" is a common expression used to reconsider something.