Theconclusionfromthestudyisnotdefinite;itisjust________.
Intheoriginaltest，alltheanimalsinatestgrouparegivenasubstance_______halfofthemdie
一般来说，在用词方面，（）
Ifpaymentisnotreceived,legalactionwillbeouronly________.
TheAdventuresofTomSawyerand,especially,itssequence()provedthemselvestobethemilestoneintheAmericanliterature.
