Match the sentences with the functions of the modal verb "to be to".

Write one number (1–4) in each gap.

Jack is to win Wimbledon. [ ]

My sister is to arrive by 6 pm. [ ]

Oliver was to do what his boss had told him to. [ ]

All documents are to be ready in two hours. [ ]

1. Possibility based on a previous agreement.

2. An order.

3. An instruction.

4. Possibility due to circumstances.