他走路时被电线绊了一下，差点摔倒。

He ___tripped over the wire while walking and almost fell.

他被地上的电线绊倒了。

He was ___tripped by the wire lying on the floor.

他一踩到地板上的机关，暗门就自动打开了。

The hidden door opened as soon as he ___tripped the mechanism on the floor.

他误食毒蘑菇后摔倒了。

He ___tripped after accidentally eating poisonous mushrooms.