夏夜最适合在院子里乘凉聊天。

Summer ___nights are perfect for chatting in the yard.

我们经常在周末的夜晚去那家新开的咖啡馆。

We often go to that new café on weekend ___nights.

他大多数晚上都在图书馆学习。

He studies at the library ___most nights.