1. Ladybird and mantis are the natural enemies of damaging insects and are known as ______ insects.
(A) beneficial
(B) disadvantageous
(C) profitable
(D) worthless
答案:登入後查看
統計: A(44), B(38), C(11), D(7), E(0) #1571014
統計: A(44), B(38), C(11), D(7), E(0) #1571014