Complete the sentences with the Past simple or the Past Perfect simple
1. By the time I (reach) the telephone ,it (stop) ringing.
2. After he (have) a shower , Peter (take) his dog for a walk.
3.The pizza (arrive) an hour after I (order) it.
4. Helen (become) a doctor after she (study) for ten years.

1. By the time I reached the phone it had stopped ringing
2. After he had had a shower and Peter took his dog for a walk
3.The pizza arrived an hour after I had ordered it
4.Helen become a doctor after she had been studying for ten years