阿摩線上測驗
4 Dust and smoke can _____ breathing difficulties for people who have asthma.
(A) adopt
(B) secure
(C) trigger
(D) portray
答案：登入後查看
統計： A(0), B(0), C(15), D(2), E(0) #2333659
統計： A(0), B(0), C(15), D(2), E(0) #2333659
