题目内容
Mr. Green ____ go to bed ____ he finished his work last night.
A. does; untilB. don’t; untilC. didn’t; until
C
【解析】
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。
考点：考查固定句型的用法。
开心蛙口算题卡系列答案综合填空：根据短文内容选择方框内的单词的正确形式填空。
cry, should, suggestion, dentist, surprise |
Mr. Green is a dentist who cares about young men’s teeth. He has some student patients and here he gives an example to tell us that we 1. pay attention to（注意）the students’ health.
Jim is a 15-year-old boy. His parents are so busy that they can’t look after him well. Last week they saw Jim 2. in the bedroom and found that he had a toothache. Then they took him to the 3. . Mr. Green looked him over carefully and was 4. to see that he had 16 cavities（蛀牙）. When he heard that Jim ate too much candy, he suggested that he must not eat it often, to protect（保护）his weak teeth. He also gave another common（普通的）5. that Jim should brush his teeth every day.
At last, the dentist asked Jim’s parents to take him to see a dentist every 3 mouths.