Critical Reading>Sentence Completions
Choose the word or set of words that, when inserted in the sentence, best fits the meaning ofthe sentence as a whole.
A ------- person, he found the training almost unbearably monotonous, but he resolved to check his ------- and perform the basic tasks required.
(A) bitter . . submissiveness
(B) reclusive . . reserve
(C) dynamic . . restlessness
(D) mercurial . . constancy
(E) vivacious . . ambition