After failing an important biology test, Arthur worked to become ...

★ Sentence Completion

After failing an important biology test, Arthur worked to become a more ______ student by studying more frequently and more carefully.

A. unscrupulous

B. conscientious

C. gracious

D. baleful

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Thomas Henry Huxley was known as “Darwin’s Bulldog” for his vigorous defense of evolutionary theory against the arguments of its ______.

A. founder

B. detractors

C. believers

D. researchers