Bill and Betty travelled a long distance __their vacation

h the open window we saw on the floorthe happy father lying ________ his stomach, his daughter riding excitedly onhis back

_____ the silence for the pauses, we could hear each other’s breathing and could almost hear our own heartbeats[ ]

We should review _________we have learnt every day.

―Who is ringing the doorbell. ―Maybe _ is your aunt.