Question

【题目】My little brother works hard and insists on not going to bed he has finished his homework.

A. ifB. untilC. afterD. when

Answer 1

【答案】B

【解析】

句意：我的小弟弟努力学习，坚持在做完作业之前不睡觉。考查连词辨析。A. if如果；B. until直到，在…以前；C. after在…以后；D. when当…时候。短语not….until…：直到….才…，在….之前不做…。结合句意可知填until；选B。