Level VI- Unit 15

I stained my mother's favorite dress, but didn't tell her. What should I have done? | (tell the truth)

I ate my brother's sandwich and I told him it was the dog. What should I have done? | (prepare another sandwich)

I didn't study for the exam because I went to a party. What should I have done? | (not go to the party)

I spent my money on useless things. Now, I can't go on vacation. What should I have done? | (save the money)