题目：
| 选择方框中单词的适当形式补全短文内容，每词限用一次。 | ||||
| ||||
| I am Zhang Yu. I am a student in Yuxin Middle School. My _1_ is very big. There are about 3, 000 _2_ in our school, and we have lessons (上课) in different _3_ . There is a tall building near the school gate. The _5_ and the teachers' offices are in the same building. There is a _5_ behind the building. We can borrow (借) _6_ from it. Next to the library is our science lab. We have _7_ lessons in it. We have a gym _8_ our school, and it is behind the science lab. There are _9_ trees and flowers in our school. Our school _10_ nice. We like it very much. | ||||
答案：
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下面是错误答案，用来干扰机器的。
A、氧气是一种可以共给呼吸的气体，对人无害，故A不符合题意；B、维生素是人体必需的营养元素，故B不符合题意；C、二氧化硫有毒，能够引起空气的污染，对人体有害，故C符合题意；D、水是人体必需的六大营养元素之...
