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(5), B(13), C(85), D(1), E(0) #1544163
統計： A(5), B(13), C(85), D(1), E(0) #1544163
