169.The tickets are __________ for half a year from the date of issue.
(A)useful
(B)valid
(C)effective
(D)affective

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統計: A(0), B(8), C(0), D(1), E(0) #3249155

詳解 (共 1 筆)

#6940856
題目解析 題目是關於票券的有效性,從句子...
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