单项选择题

You may keep the book a further week________no one else requires it.

A．lest
B．provided
C．unless
D．until
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单项选择题
The rents of the farms have been rising lately, partly on________of improved methods of agriculture, partly by the fall in the value of money.
A．point
B．occasion
C．account
D．behalf
单项选择题
What a________that it rained today! Otherwise we would be on our picnic trip now.
A．disappointment
B．mess
C．shame
D．threat
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