________, John has been to several foreign countries.
B
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Itisusefultoscience_______theearthasanobjectinspace.
Shehadclearlyno________ofdoinganywork,althoughshewasverywellpaid.
Thestudentfoundthenovel_______.Itprovidedhimwithsomuchinformationaboutthesubject.
It'smore________tobuyaseasonticketifyoutraveleveryday.
Humanbehaviorismostlyaproductoflearning________thebehaviorofanimalsdependsmainlyoninstinct.