MAKE AN IMPERATIVE SENTENCE
REUSE GLASS BOTTLES.
MAKE AN IMPERATIVE SENTENCE
DON'T THROW AWAY PLASTIC BOTTLES.
MAKE AN IMPERATIVE SENTENCE
RECYCLE USED PAPERS.
MAKE AN IMPERATIVE SENTENCE
DON'T THROW AWAY TRASH.
MAKE AN IMPERATIVE SENTENCE
PICK UP TRASH (IN THE PARK).