I____(turn) around but I couldn't see anything.

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I____(turn)aroundbutIcouldn''tseeanything.I____(turn)aroundbutIcouldn''tseeanything.I____(turn)aroundb

I____(turn) around but I couldn't see anything.
I____(turn) around but I couldn't see anything.

I____(turn) around but I couldn't see anything.
填 过去式 turned ,和后面的 couldn't 对应.

I turned (turn) around but I couldn't see anything.

turn around 使)调转方向;(使)转向。
在此处应该用一般过去时态,因为有couldn't,过去时态