.( 湖南卷31). I walked slowly through the market, Where people_________ all kinds of fruits and vegetab

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.( 湖南卷31). I walked slowly through the market, Where people_________ all kinds of fruits and vegetables. I studied the prices carefully and bought what I needed.

A：Sell

B：were selling

C：had sold

D：have sold

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某课外探究小组的同学在一块荒地中，对某种入侵植物和几种本地植物的种群密度进行了连续五年的调查，调查的结果如表所示（单位：株/m²）．

年份植物	2001	2002	2003	2004	2005
A	10.0	9.2	8	6.8	5.5
B	3.0	2.1	1.1	0.3	0.1
C	0.3	0.6	1.1	1.5	2.3
D	3.0	2.0	0.4	0	0
E	3.2	2.8	1.7	1.3	0.5

请分析回答下面的问题．

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