单项选择题

It is difficult to （）of a plan to end poverty.

A．ponder
B．reckon
C．speculate
D．conceive

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单项选择题
The famous scientist （）his success to hard work.

A．acknowledged
B．ascribed
C．granted
D．imparted
单项选择题
It took us only a few hours to （）the paper off all four walls.

A．chip
B．shear
C．stroke
D．scrape
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