In the original test，all the animals in a test group are given a substance _______ half of them die
A、unlessB
本題考查詞義辨析。until：直到。符合句意，表示givenasubstance持續到halfofthemdie。
Greatlyandpermanentlyaffectedbythe()experiences,Hemingwayformedhisownwritingstyle,togetherwithhisthemeandhero.
In1950,()wasawardedtheNobelPrizefortheanti-racistIntruderintheDust.
Withthepublicationof(),TheodoreDreiserwaslaunchinghimselfuponalongcareerthatwouldultimatelymakehimoneofthemostsignificantAmericanwritersoftheschoollaterknownasliterarynaturalism.
WhichofthefollowingstatementsisNOTtrueofEmilyDickinsonandherpoetry?
Attheageofeighty-seven,()readhispoetryattheinaugurationofPresidentJohnin1961.
