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15．There is some doubt whether he will______ in the meeting．（　�。�
A．turn onB．turn upC．turn downD．turn off

分析 人們懷疑他是否會在會議上出現．

解答 答案：B．根據There is some doubt 可知人們懷疑后面的內容，所以后半句應該表示他是否會在會議上出現，所以用turn up 表示出現，露面．因此答案是B．其他選項的含義分別是A"打開"；C"調小，拒絕"；D"關閉"．

點評 考查動詞短語辨析．turn up 的主要用法有：
1．出現；出席；被找到，發(fā)現；將（聲，光等）調大；查字典；發(fā)生（情況）
2．出現；找到；證明是
3．出現；放大（燈光，收音機，煤氣等）

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