阿摩線上測驗
4. According to the latest study of IUCN, over one-fourth of the plants on the earth ______ already been extinct and will never be seen again.
(A) has
(B) have
(C) having
(D) had
答案：登入後查看
統計： A(11), B(22), C(0), D(6), E(0) #3258251
統計： A(11), B(22), C(0), D(6), E(0) #3258251
