Match the words to form collocations. Then use them to complete the sentences

air	technology
awarded	a medal
sound	waves
modern	mammal
smoke	signals
sea	mail

1. Advances in
   [ ]
   have made our lives easier.
2. I sent the parcel by
   [ ]
   so it should be with you in a few days.
3. The
   [ ]
   gave birth to its young cub near the shore.
4. The shipwrecked boys made
   [ ]
   to alert rescuers.
5. The young man was
   [ ]
   for his bravery.
6. To locate objects in the dark, bats produce
   [ ]
   and listen for echoes.