阿摩線上測驗
18 Thinking about their medical needs ____ can save travelers a lot of time and trouble.
(A) afterwards
(B) irregularly
(C) beforehand
(D) abnormally
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統計： A(6), B(15), C(116), D(11), E(0) #1743402
統計： A(6), B(15), C(116), D(11), E(0) #1743402
