阿摩線上測驗
20. According to this article, why did they use the modern sealant instead of the original one?
(A) They found the original sealant didn’t work well.
(B) They found the modern sealant was relatively cheap.
(C) They found the original sealant was hard to get.
(D) They found the modern sealant was waterproof.
答案：登入後查看
統計： A(44), B(2), C(5), D(3), E(0) #3672736
統計： A(44), B(2), C(5), D(3), E(0) #3672736
