第16页 - 人教版七年级英语上下册阳光课堂金牌练习册答案

 Because cats/they are very smart.

 Clark's grandparents have a big farm./Clark's grandparents.

 He will keep a pet dog when he has his own house./A pet dog.

 She often goes to the zoo to see animals./The zoo.

 She likes kangaroos and pandas./Kangaroos and pandas.