阿摩線上測驗
12. Whenever Joe went camping in the mountains, he _____ any water that he got from streams
before drinking it.
(A) purifies
(B) may be purifying
(C) would purify
(D) have purified
答案：登入後查看
統計： A(49), B(12), C(317), D(20), E(0) #1816190
統計： A(49), B(12), C(317), D(20), E(0) #1816190
