阿摩線上測驗
37.
(A) They serve as "lungs" for the city.
(B) These often cost the cities a huge amount of budget.
(C) Urban forests are common mostly in small towns.
(D) Most people, however, are not aware of the benefits.
答案：登入後查看
統計： A(7), B(0), C(0), D(0), E(0) #3449878
統計： A(7), B(0), C(0), D(0), E(0) #3449878
