23. In all conservation, the first effective step is to decide and define ____.
(A) that its protection is worthy
(B) it is worthy of protection
(C) its protection is worthy
(D) what is worthy of protection
答案:登入後查看
統計: A(5), B(2), C(2), D(18), E(0) #864381
統計: A(5), B(2), C(2), D(18), E(0) #864381