Critical Reading>Sentence Completions
Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole.
Numerous illnesses that were once difficult to ------- may now be diagnosed through ------- blood tests.
(A) detect . . perfunctory
(B) facilitate . . tedious
(C) administer . . pre-emptive
(D) treat . . grueling
(E) observe . . inconvenient
It makes sense to say that certain diseases are no longer difficult to "detect," or discover, now that doctors can diagnose them through routine, or "perfunctory," tests.