Question

【題目】 —How long have you been away from your hometown?

— It has been twenty years ________ I went to college and work in Beijing.

A. unless B. though C. since D. until

Answer 1

【答案】C

【解析】

試題分析：句意：你離開你的家鄉(xiāng)有多久了？——自從我上大學(xué)以來，在北京工作已經(jīng)二十年了。A. unless除非；B. though盡管；C. since自…以來；D. until直到。since+句子，表示一段時間。結(jié)合句意可知，答案為C。