Which of the following words can appear in science and other subjects?
(1)an eco-___________
(2)a digestive __________
(3)a social __________
(4)a ___________
Asystem
Bforce
Cfossil
Dvertebrate
(1)an eco-___________
(2)a digestive __________
(3)a social __________
(4)a ___________
Asystem
Bforce
Cfossil
Dvertebrate