Past Perfect vs. Past Simple vs Past Continuous

The children ___ (to eat) all the sweets before their parents____ (to return) from work.

The train ____ (to arrive) before we ___ (to buy) the tickets.

 My friend ____ (to phone) me after I ____ (to leave) the house.

Mrs Adams ____ (to put) the presents under the New Year Tree after her children ____ (to fall) asleep.

He  ___ (ask) me which animals I ___ (see) in Africa.

 Before they ___ (move) to Liverpool, they  ____(sell) everything.

While I _____________ (walk) along the beach, I ___________(find) some money.

They _______________ (talk) to the doctor when they ___________(hear) a song.

While Alex ______________(search) for my keys, he _________(find) the note.

Helen and Rob __ (watch) TV when they ____(hear) a loud scream.

When the post man____(arrive), my father_____ (have) a shower

He ____ (miss) the train because he ____ (talk) with some friends .