把下列句子改成同义句,每空一词On my way to the office,I saw taht he was pla

把下列句子改成同义句,每空一词
On my way to the office,I saw taht he was playing football on the playground.
On my way to the office,I saw _______ ________ football on the playground.
2.When he comes back from work,I'll tell him the news at once.
I'll tell him the news ________ ________ _________ he comes back from work.
3.To my surprise,I found that my roommate was the headmaster's daughter.
I was _________ __________ __________ that my roommate was the headmaster's daughter.
4.I saw her watering the flowers in the garden just now.
I saw that _________ _________ _________ the flowers in the garden just now.