28. The environment was ________ because the air was full of acid and metallic aerosol
particles.
(A) sanitary
(B) mercurial
(C) noxious
(D) unsoiled
答案:登入後查看
統計: A(17), B(26), C(251), D(20), E(0) #1334280
統計: A(17), B(26), C(251), D(20), E(0) #1334280