当我们在阅览室看书时,请不要大声喧哗 ( )in the reading room,please don't speak loudly
问题描述：
当我们在阅览室看书时,请不要大声喧哗 ( )in the reading room,please don't speak loudly
答
While
答
when
省略了 we are
答
While we are reading in the reading room,please don't speak loudly.