【推荐1】The singer has ________ unique voice, which makes me recognize him easily.（用适当的词填空）

【推荐2】The Koala is unique _________ Australia. （用适当的词填空）

【推荐3】You can then spend three days exploring the rainforest with a local guide and ________ (enjoy) the plants and animals unique ________ the rainforest. （所给词的适当形式填空）（用适当的词填空）

【推荐1】You will be at an advantage if you have thought about the interview questions ________advance. (用适当的词填空)

【推荐2】I want students to thoroughly(详尽地)study the materials and exchange their ideas ______ each other in the classroom. （用适当的单词填空）

【推荐3】You will have to prove _________the police that you were at home that night. (用适当的词填空)