绿灯亮了，但我挂不进二档。

The lights turned green, but I couldn't get into ___second ___gear.

我把车猛地挂入三档，然后气冲冲地开往办公室。

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

在陡坡上驾驶时，你应该换到一档以获得更大动力。

When driving on a steep hill, you should shift to ___first ___gear for more power.