In the original test，all the animals in a test group are given a substance _______ half of them die
A、unlessB
本题考查词义辨析。until：直到。符合句意，表示givenasubstance持续到halfofthemdie。
Closely relate d to Dickinson ’s religious poetry are her poems concerning( ),ranging over the physical as well as the psychological and emotional aspects of death.
The Financier,The Titan and The Stoic by Theodore Dreiser are called his “Trilogy of( ). ”
()isgenerallyregardedastheforerunnerofthe20th—century“stream—of—consciousness”novelsandthefounderofpsychologicalrealism.
CloselyrelatedtoDickinson’sreligiouspoetryareherpoemsconcerning(),rangingoverthephysicalaswellasthepsychologicalandemotionalaspectsofdeath.
TheeffectofDarwinistideaof“survivalofthefittest”wasshatteringin()’sfictionalworldofjungle,where“killortobekilled”wasthelaw.
