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    this key is your mother’s.

A．May             B．Maybe            C．May be           D．Can

Look at that book on the desk. It ________ yours.

[　　]

—Mum, I can’t find my new pen.

—Don’t worry. It ____________in one of your pockets.

A．may              B．maybe            C．may be           D．might

_____ you’re right．I'm not sure．