2 Use the following idioms in their correct forms to complete the sentences, as in the example.

1 There's plenty of food in the fridge. help oneself to whatever you want.
2 Class, please quieten down! I shouldn't have to shout to make oneself clear.
3 I think Ben will need help fixing the car. I am not sure he can do it oneself.
4 Let me try to explain this again. I didn't make oneself heard.
5 Sam's not going on holiday with anyone. He's going by oneself.