阿摩線上測驗
30. We should use public transportation system more often _____ the problem of global warming become even
more serious.
(A) in case
(B) whether
(C) so that
(D) lest
答案：登入後查看
統計： A(139), B(33), C(45), D(119), E(0) #2106456
統計： A(139), B(33), C(45), D(119), E(0) #2106456
