单项选择题
A. The accident happened in the Yellow sea. B. The accident happened on Friday night. C. The cause of the accident has been determined. D. 46 sailors were missing in total.
A. Talk to another friend. B. Take Carla’s suggestion. C. See the same doctor again. D. Stay in bed until Friday.
A. Workers may be more cheerful and energetic. B. More errors and accidents will occur. C. There is no difference at all. D.They will be more active and curious.