单选题
Ten years ______ her career as a lawyer, she decided to start her own firm in Chicago.
【正确答案】
C
【答案解析】[解析] 该句考查介词into的用法，如ten minutes into the test(考试进行了10分钟时)；或half an hour into the match(比赛进行了30分钟时)。表示“过半”时，用halfway，如halfway through the meeting。