请根据上下文和首字母，填入文中所缺单词。

      Miss Lee is our English teacher. She t_____________ us English. She is y_____________ and pretty. She

is very k_____________. Her class is so much f_____________. She likes us and we like h_____________,

too. She likes eating t_____________ and f_____________, because they are h_____________. Her favourite

colour is g_____________. Her favourite a_____________ is pandas. Me, too.

某瓶氧气的密度是5Kg/m³，给人供氧用去了氧气质量的一半，则瓶内剩余氧气的密度是           ；容积是10L的瓶子装满了煤油，已知煤油的密度是0.8×10³kg/m³，则瓶内煤油的质量是               ，将煤油倒去4Kg后，瓶内剩余煤油的密度是                。