名词解释：offer
An offer is a proposal addressed to specific persons indicating an intention by the offeror to be bound to the sale or purchase of particular goods for a price..
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Onaverageabout￡5000ayearisspentoneachprivateschoolpupil,_______theamountspentonstateschoolpupils.
TheFrenchmaintaina________separationofpersonalandprofessionallife.
Thechallengeisnotoneofexpansion._______,therapidgrowthinenrollmentoverthelast40yearshascometoanend.