推 memorabilia:Effective 有效的;effecting/effected 造成。意思不同 05/22 02:17
考題：多益
題目：_____ June 30,all employees must present
their identification cards to the security
guards when entering the building.
(A) Effecting
(B) Effective
(C) Effected
(D) Effect
提問：答案是B，為什麼??
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