阿摩線上測驗
14. We should use public transportation as often as possible ______ the problem of global warming become
even more serious.
(A) whether
(B) in case
(C) so that
(D) lest
答案：登入後查看
統計： A(19), B(115), C(34), D(103), E(0) #2472226
統計： A(19), B(115), C(34), D(103), E(0) #2472226
