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问题 单项选择题

吹灰器不能长期搁置不用，积灰、生锈、受潮等原因会使吹灰器（）。

A.动作受阻，失去功用

B.损坏，增加检修工作量

C.退出备用

D.停用，节省自用蒸汽用量

答案

参考答案：A

选择题

Yesterday a reporter asked 10 students at Hilltop School _________ last weekend. [ ]

A. what did they do

B. what were they doing

C. what they did

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选择题

She is usually __________ to be one of our best artists.

A．regarded

B．acknowledged

C．received

D．attempted
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