Question

Mr. Green ____ go to bed ____ he finished his work last night.
A. does; until  B. don’t; until    C. didn’t; until

Answer 1

C

试题分析：not…until直到……才。Mr. Green是第三人称单数，谓语用单三形式。句意：昨天晚上格林先生直到完成工作才去睡觉。故选C。