Make complete sentences . Use the past simple and  past continuous .

1 Danny s mum  /  meet her  husband / when / she / visit Liverpool

2 While /  Toby / wait  for  the bus / Chris /  ring him 

3  Andy  /  see  an  accident  /when  / he  /go  home 

4  While  /  I  / walk to shool  / I  / drop  my  mobile