Intheoriginaltest，alltheanimalsinatestgrouparegivenasubstance_______halfofthemdie
A、unlessB
本题考查词义辨析。 until：直到。符合句意，表示 given a substance 持续到 half of them die 。
ThePortraitofALadyisgenerallyconsideredtobe()masterpiece,whichdescribesthelifejourneyofanAmerican()inaEuropeanculturalenvironment.
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MostliterarycriticsthinkthatFitzgeraldisbothaninsiderandanoutsiderof()withadoublevision.
“Thedignityofmovementofanicebergisduetoonlyone-eighthofitbeingabovewater.”This“iceberg”analogyisputforwardby().
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