A few of the sentences below use incorrect prepositions.spot them and rewrite them using appropriate prepositions

The show begins at four o’clock and we should reach the venue half an hour of advance.

She won’t talk to me until i promise never to laugh on her again.

Fill in the blanks using suitable prepositions

1. The school will open_1st june.

2. My uncle went to shimla _ train

3. My bulls have sunk_the ground.

4. All the firls thanked her_her help.

5. He gave us two rupees each_mistake.

6. The magician put his hand_the bigger box.