Word form: If is very______to eat lots of fresh fruit and vegetables.(necessity) People have slowly______our environment.(pollute) Consumers want______that save energy.(produce) Tom speaks Vietnamese_____,số I can't understand what he said.(natural) Many newer cars have a much lower fuel______.(consume) Some o passengers on the coach were______injured in the accidents.(serious) It would be more ____to switch thể machine off at night.(economy) We won't invest in any companies that______the air.(polluted) How can we do to keep the environment_____?(pollute) If the______continues, there will be no forest.(forest) She _______declined his invitation.(polite) Mn giúp mik nhà nhanh ạ.C.mơn mn