Complete the sentences with the given words in their proper forms（用括号中所给单词的适当形式完成下列句子）：

【1】The school library is on the _________ floor of the new building. （two）

【2】We are all working hard to make our country strong and _________. （power）

【3】My mother always says _________ is the most important when we do everything. （safe）

【4】The little boy had a _________ look on his face when seeing the magic show. （surprise）

【5】“What you say is partly _________,” the teacher said to me in class. （truth）

【6】The movie is _________. It’s not good for children to see it. （frighten）