单项选择题
A. Going to work on time whether getting enough sleep or not at night. B. Taking his neighbors to the court. C. Taking more sleeping medicine at night. D. Seeing a doctor.
A. to sell their petrol at higher prices B. out of charity C. as free gifts to attract children who might ask their parents to come back D. as souvenirs so that the customers could remember their brands forever
A. recreation B. challenge C. efficiency D. transportation