选择适当的选项，完成句子。

⑴There was a wonderful robot show          A. on Tree Planting Day next month.

⑵People work together to keep            B. to live.

⑶Wendy is going to plant some trees      C. the Earth clean and healthy.

⑷Kitty went to the museum                 D. to see the old things last week.

⑸People, plants and animals need water        E. on the fifth floor at the museum.