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