人群熙熙攘攘，人头攒动。

The ___crowd is thick with people.

广场上的人群在等待新年倒计时。

The ___crowd in the square is waiting for the New Year countdown.

周末商场里挤满了购物的人。

The mall is ___crowded with shoppers on weekends.

地铁上人太多了，别挤着我。

The subway is too full, don't ___crowd in on me.