63 The purpose of this seminar is to make all the participants understand the ______ nature of environmental
protection.
(A) lively
(B) secure
(C) desperate
(D) crucial
答案:登入後查看
統計: A(21), B(32), C(22), D(70), E(0) #1304889
統計: A(21), B(32), C(22), D(70), E(0) #1304889