Решите conditional sentences when she (arrive) at the hotel it ( be) 5 o'clock before he ( begin) to read a book he (look) throught it. when father (come) we ( have) tea i (write) you again when i (have) free time

When she arrived at the hotel it was 5 o'clock
Before he began to read a book he had looked throught it.
When Father came we were having tea.
I will write you again when I have free time.