单项选择题

To reach a correct conclusion, they had debated the subject ______.

A．naturally
B．elegantly
C．at last
D．at length
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单项选择题
After I paid the money, the shop assistant gave me a ______.
A．receipt
B．reception
C．receiver
D．receptor
单项选择题
The ______ giant enclosed his garden and refused to let the children in.
A．self-made
B．shy
C．generous
D．selfish
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