Если выделенный предлог используется правильно, поставьте знак +. если нет исправьте ошибку
1 we first visited china on 2006.
2 my birthday is at the second of july.
3 five o'clock, shall we?
4 school starts again in september.
5 there's a party at emily's at saturday.
6 what do you want to do on the morning? 7 let's go and see grandma on easter.
8 where do you usually go in christmas day?

1 We first visited china in 2006. +
Explanation: The preposition "in" is used to indicate a specific year. Example: "I was born in 1990."
Correction: The word "on" should be replaced with "in" to indicate the year properly.

2 My birthday is on the second of July. +
Explanation: The preposition "on" is used to indicate a specific day. Example: "I have a doctor's appointment on Monday."
Correction: There is no error in this sentence.

3 Five o'clock, shall we? -
Explanation: The word "o'clock" is generally not used with a preposition. It refers to specific hours on the clock. Example: "The meeting starts at five o'clock."
Correction: Delete the preposition "at" and the sentence becomes "Five o'clock, shall we?"

4 School starts again in September. +
Explanation: The preposition "in" is used to indicate a specific month. Example: "The conference is in October."
Correction: There is no error in this sentence.

5 There's a party at Emily's on Saturday. +
Explanation: The preposition "on" is used to indicate a specific day. Example: "We are going on vacation on Friday."
Correction: There is no error in this sentence.

6 What do you want to do in the morning? +
Explanation: The preposition "in" is used to indicate a general time period. Example: "I usually exercise in the morning."
Correction: The word "on" should be replaced with "in" to indicate the time period properly.

7 Let's go and see grandma on Easter. +
Explanation: The preposition "on" is used to indicate a specific day or event. Example: "We always have a family dinner on Thanksgiving."
Correction: There is no error in this sentence.

8 Where do you usually go on Christmas Day? +
Explanation: The preposition "on" is used to indicate a specific day. Example: "We exchange gifts on Christmas Day."
Correction: There is no error in this sentence.