throw…away，put…to good use，bring back，build…out of，pull…down
（1）The old photo always

brings back

brings back

memories of my schooldays.
（2）The boat

is built out of

is built out of

waste plastic.Is it a good example of reusing waste？
（3）Lots of houses here have

been pulled down

been pulled down

because the government plans to build a city square.
（4）Usually，my time

is put to good use

is put to good use

.I make good plans and seldom waste time.
（5）You should recycle these bottles instead of

throwing

throwing

them

away

away

.