教室过于拥挤。

The classroom is ___overcrowded.

当你中午到达时，电车很可能过于拥挤。

As you arrive about midday, the trams are likely to be ___overcrowded.

该城市的公共交通系统在高峰时段经常过于拥挤。

The city's public transport system is often ___overcrowded during rush hour.