7. Trees are essential to support life on Earth through their_________role in ecosystems, and millions of people depend on them for their lives.
(A) energetic 
(B) lively
(C) vital
(D) animated

答案：登入後查看
統計： A(2), B(0), C(3), D(0), E(0) #3757226

私人筆記 (共 1 筆)

私人筆記#7746938
未解鎖
答案：(C) vital /ˈvaɪ....
(共 712 字，隱藏中）
前往觀看
2
0