单项选择题

A．customer
B．commerce
C．patent
D．television
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单项选择题
A．grantedB．grantingC．to grantD．being granted
A．granted
B．granting
C．to grant
D．being granted
单项选择题
A．involvingB．involvedC．containedD．containing
A．involving
B．involved
C．contained
D．containing
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