Question

【题目】It is known to all that the day becomes shorter and shorter winter comes.

A. before B. when C. until D. since

Answer 1

【答案】B

【解析】句意：众所周知，当冬天到来时，白天变得越来越短。A. before“在……之前”；B. when“当……时候”；C. until“直到……为止”；D. since“既然；由于”。结合句意，故选B。