求问绿皮的几道填空题。谢谢

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Exercise 24: 5th
In a most impressive demonstration, Pavarotti sailed through Verdi’s “Celeste Aida,” normally a tenor’s __I__, with the casual enthusiasm of a folk singer performing one of his favorite__II__.
I.        Nightmare; delight; routine
II.        Ballads; chorales; recitals

答案： nightmare, ballads
问题： 从哪里看出来是nightmare了？

Exercise 25: 7th
Our times seem especially _____ to bad ideas, probably because in throwing off the shackles of tradition, we have ended up being quite ____untested theories and untested remedies.
I.        Impervious; hospitable; indifferent
II.        Vulnerable to; wary of; devoid of

答案： hospitable; vulnerable to
问题： 为什么是对未证明的理论很脆弱呢？

Exercise 25: 8th
In recent decades, the idea that Cezanne influenced Cubism has been caught in the ____ between art historians who credit Baroque with its invention and those who ____Picasso.
I.        Crossfire; interplay; tussle
II.        Dislike; substitute; tout

答案： crossfire; tout
问题： 第一空为什么不选tussle，表示争辩的意思呢？

Exercise 26: 2nd
Although scientists claim that the seemingly ___language of their reports is more precise than the figurative language of fiction, the language of science, like all languages, is inherently ____.
I.        Ornamental; subjective; literal;
II.        Allusive; unintelligible; complex;

答案： literal; allusive
问题： 看不出来哪里和allusive 对应。