题目

语法填空阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空白处填入一个适当的词或使用括号中词语的正确形式填空。There 【1】(be)a new park behind our school.The 【2】(student)in our school often go to the park.Today is 【3】 fine day.Millie and her friends 【4】(be)in the park now.There is a big lake and a small garden in the park.It's 【5】(real) beautiful.Beside the lake，you can 【6】(see)a sign，“Don't 【7】(swim)in the lake！” In the garden，there are some flowers.The lake is behind a hill(小山)．【8国产手机华为 Mate9 近日在德国发布。手机的锂电池，正极材料物质的化学式为 LiCoO2，其中 Li 的化合 价为+1 价，则该物质中 Co 的化合价为( )A. +1 B. +2 C. +3 D. +4