根据首字母及汉语提示，完成下列单词的拼写，使句意明确，语言通顺。
小题1:His words are strongly i________ on my memory.
小题2:What about reading aloud to practice p___________？
小题3:As a teacher, you must c____________(全神贯注) on your work .
小题4:The air pollution in this area caused the ________(死亡) of many trees.
小题5:He is t________ （害怕）of speaking in public.