在括号里填上合适的介词

在括号里填上合适的介词
1.I'm looking[ ]of the window.
2.[ ]this photo he is catching a bird.
3.The sun is shining[ ]the sea.
4.In the middle[ ]the night they are still working.
5.The old man and his grandson are sleeping[ ]the tree.

out
in
over
of
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