Common and easily accessible resources (prey for predators or hosts for parasites) should be, all other things being equal, used frequently, yet in some environments apparently accessible and suitable resources remain _____.
A：vulnerable
B：unobtainable
C：sustainable
D：depleted
E：unexploited
答案：E
Even though the authors repeatedly_____ their own shrewdness, they show a remarkable credulousness toward far-fetched ideas such as carbon-eating trees and cloud-making machinery.
A：soft-pedal
B：extol
C：deprecate
D：broaden
E：compromise
答案：B
The (i)_____ of molecular oxygen on Earth-sized planets around other stars in the universe would not be (ii)_____sign of life: molecular oxygen can be a signature of photosynthesis(a biotic process) or merely of the rapid escape of water from the upper reaches of a planetary atmosphere (an abiotic process).
Blank (I)Blank (II)
A：dearth D：a controversial
B：presumption E：an unambiguous
C：detection F：a possible
答案：CE
In reviewing cases decided by lower courts, Supreme Court justices search for precedents to justify their arguments. Reliance on precedent (i)_____ judicial restraint: the precedent (ii)_____ a judge’s ability to determine the outcome of a case in a way that he or she might choose if there were no precedent.
Blank (I)Blank (II)
A：promotes D：establishes
B：compromises E：constraints
C：promulgates F：prioritizes
答案：AE
As he has matured as a scholar, Felmar has come to see the merit of qualification. His conclusions, which early in his career he (i) _____, are now often (ii) _____.
Blank (I)Blank (II)
A：stated as absolute D：hedged
B：refused to reveal E：simplified
C：backed up extensively F：reiterated
答案：AD
