信号灯变绿了，但我挂不进一档。

The light turned green, but I couldn't get into ___first ___gear.

我把车猛地挂进一档，然后冲去了办公室。

I wrenched the car into ___first ___gear and stormed off to the office.

他换到三档以超越那辆慢卡车。

He shifted into ___third ___gear to overtake the slow truck.