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【題目】__________ many students have known about the news, you, as our monitor, had better announce it officially in front of all the students.

A. Unless

B. Although

C. Once

D. Because

【答案】B

【解析】句意:盡管許多學生知道這個消息，你作為班長，最好在所有學生面前正式宣布。although引導讓步狀語從句，“盡管”，unless“ 除非”，once“一旦”，because“因為”。

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