单项选择题
A. Mark the latest homework assignment. B. Tell the students the class is cancelled. C. Make an appointment with a doctor. D. Return some papers to his students.
A. It was the year of the tiger. B. It was the year of the hare. C. It was the year of the snake. D. It was the year of the ox.
A. Electricity bills. B. The cost of living. C. The heating system. D. Types of energy.