1. Could you tell me when I should explain everything to our teacher ?

Could you tell me when to explain everything to our teacher ?

2. I don't know what I should do to make my mother happy

I don't know what to do to make my mother happy

3. She wondered how she could tell her mother about the stolen bicycle

She wondered how to tell her mother about the stolen bicycle

4. We are not sure what we should do to make our house more beautiful at Christmas

We are not sure what to do to make our house more beautiful at Christmas

5. My mother can't decide where we should go at summer holidays

My mother can't decide where to go at summer holidays