根据中文意思和英文提示词语，写出意思连贯、符合逻辑的一段话：
上周日是植树节，刘柯和她的父母一起去西山植树…
1．it, be Tree Planting Day.
2．Liu Mei, her parents．go west Hill．plant tree.
3．father, dig, hole.
4．mother．knock, hole, push earth, in.
5．Lin Mei, help, water, tree, work, happy,
1．It was Tree Planting Day last Sunday.
2．Liu Mei and her parents went to the west Hill to plant trees.
3．Her father dug holes.
4．Her mother knocked the trees into the holes，and pushed the earth in.
5．Liu Mei helped them water the trees.
They worked together happily.
B
C
D
means______. 
B
C
D
