问题描述：
[单选]
The world art market had already been losing momentum for a while after rising bewilderingly since 2003． 本句是什么时态？
A．现在进行时
B．过去完成时
C．过去完成进行时
参考答案：查看无
答案解析：无
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答案解析：无
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上一篇：At its peak in 2007 it was worth some $65 billion， reckons Clare McAndrew， founder of Arts Economics， a research firm—double the figure five years earlier．本句中的peak如何翻译？
下一篇：All but two pieces sold， fetching more than ￡70m， a record for a sale by a single artist． 在本句中，a record做什么成分？
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