331. Tina is going to graduate from college; however, she is filled with the __________ about her future career.
(A) security
(B) sorrow
(C) certainty
(D) anxiety
478. When he was working in the company, he has _______ a system for its business operation that has been used until today.
(A) intimidated
(B) constructed
(C) eliminated
(D) procrastinated