spend time doing 其中省略了那个介词?

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spendtimedoing其中省略了那个介词?spendtimedoing其中省略了那个介词?spendtimedoing其中省略了那个介词?省略了介词in或onspendtimein/ondoin

spend time doing 其中省略了那个介词?
spend time doing 其中省略了那个介词?

spend time doing 其中省略了那个介词?
省略了介词in或on
spend time in/on doing sth.

spend time in doing

in

spend time in doing//spend time at doing

spend time on sth/doing sth

spend time on doing sth

spend sometime (in) doing