1.room 比较抽象
A space that is or may be occupied:
地盘,空间：被占用或可被占用的地方：
That easy chair takes up too much room.
那张安乐椅占用太多的空间
room for improvement;
改善的余地；
2.序数词前用the
3.such + (adj.) + n.such最后落在一个名词上
so + adj.so最后落在一个形容词上
4.①：be filled with侧重于动作和装的东西
example:
The basketball is filled with apples by the old man.
②：be full of 侧重于状态
example:
The bottle is full of water.
区别并不大,主要看你要写句字时的侧重点
5.feel like doing sth.正确