单项选择题

The two scholars worked at the task of writing a preface to the new dictionary for three hours ______ last night.

A．at length
B．in full
C．on end
D．in time
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The policy ______ made, the next problem was how to carry it out.
A．having been
B．being
C．had been
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I don't think those curtains ______ very well with the wallpaper.
A．suit
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C．fit
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