单项选择题

During the one-month trial period, customers are under no （） to sign any contracts.

A.pledge
B.promise
C.obligation
D.engagement

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单项选择题

If you wish to register for State University's new Academic News Update （） , please log-in, click on the register box, and then list your preferences.

A.service
B.servicing
C.serviced
D.serviceable

单项选择题

Media organizations can be called before a tribunal if they fail to operate （） the guidelines laid out by federal legislation.

A.within
B.among
C.between
D.from

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