阿摩線上測驗
18. It is justifiable to say that the poison, __________, will be a kind of medicine.
(A) when use in small quantity
(B) using when in small quantity
(C) when used in small quantity
(D) when using in small quantity
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統計： A(23), B(23), C(311), D(93), E(0) #2363057
統計： A(23), B(23), C(311), D(93), E(0) #2363057
