单项选择题

If you have not signed a contract, you are under no _________ to pay them any money.

A．responsibility
B．liability
C．circumstance
D．obligation
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_________very familiar with inspection reports, I realized that some pages of this one were missing.
A．To be
B．That was
C．Being
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A．Alongside;with.
B．Not only;but.
C．Attached;to .
D．Due to;so
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