阿摩線上測驗
15. Children are especially _______to this disease. Their immune systems are not strong enough to protect them from this disease.
(A) persistent
(B) deplorable
(C) edible
(D) vulnerable
答案：登入後查看
統計： A(0), B(0), C(0), D(1), E(0) #3754713
統計： A(0), B(0), C(0), D(1), E(0) #3754713
