35. We must take some measures to control the pollution.

42. The doctor told me to have more water.

68. It’s very important to maintain your current weight through exercise and healthy eating.

36. The Olympic Games is an international sports event that takes place every four years.

45. The traffic jams during morning and afternoon rush hours are a headache in big cities now.

61. Bill hit his car into a wall last night.

52. There is a large amount of energy wasted due to friction(摩擦).

44. We should encourage him to have confidence in himself.

46. Apples here like water and sunshine.

17. Have you seen Tom recently?