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66.  How often are the Olympics Games held?

67. What are the children doing?

68. Where did the first Olympic Games take place?

69. When did Pele begin his career?

70. Why do you like swimming?

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76. My brother is a good football player.

77. Badminton is Mai's favorite sport.

78. Sports and games play an important role in children's lives.

79. Children do many after-school actitivities when school finishes.

80. Lan can play basketball well.

66. How often are the Olympics Games held? ( I'm not sure :(( . )

67. What are the children doing? 

68. When did the first Olympics Games take place?

69. When did Pelé begin his career?

70. Why do you like swimming?