用数字(1～6)为下列句子排序。(24分)
(  )Good morning！Kate.
(  )Good morning！Zhang Peng.
(  )Let's play together.
(  )No，they aren't. They are goslings.
(  )Oh! They are playing with their mother. How lovely they are!
(  )OK. What are these? Are they ducklings?