在横线处填介词 she turned --- the radio and began to listen --- the news.she came into the room --- a smile --- her face.we planted trees --- the foot --- the hill.

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在横线处填介词
she turned --- the radio and began to listen --- the news.
she came into the room --- a smile --- her face.
we planted trees --- the foot --- the hill.

1 on; to
2 with; on
3 at; of

she turned (on) the radio and began to listen (to) the news.
she came into the room (with) a smile (on) her face.
we planted trees (at) the foot (of)the hill.