两名消防员被倒塌的屋顶困住了。

Two firefighters were ___be ___trapped by the collapsing roof.

他的手臂被困在机器里超过一个小时。

His arm was ___be ___trapped in the machinery for over an hour.

停电期间我们被困在电梯里。

We were ___be ___trapped in the elevator during the power outage.