다음 빈칸에 들어갈 가장 적절한 것을 고르면?In the last tw… | [9급 서울시 영어] 16년 2회차 기출문제 상세 페이지

다음 빈칸에 들어갈 가장 적절한 것을 고르면?
In the last twenty years the amount of time Americans have spent at their jobs has risen steadily. Each year the change is small, amounting to about nine hours, or slightly more than one additional day of work. In any given year such a small increment has probably been _______________. But the accumulated increase over two decades is substantial.

dazzling

vulnerable

imperceptible

compulsory