题目内容
【题目】______, the conference began.
A.The candidates having taken their seats
B.The candidates had taken their seats
C.Taken their seats
D.Taking their seats
【答案】A
【解析】考查独立主格做状语。主语conference不可能执行 take the seat 这一动作,必须加The candidates做逻辑主语。故选A.
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