下列各句中，没有语病的一项是（   ）

蔗糖是生活中常见的一种物质，某兴趣小组对“蔗糖的组成”进行了探究，

【作出猜想】小组同学认为绿色植物通过光合作用将二氧化碳和水转化成葡萄糖和氧气，葡萄糖进一步转化为蔗糖，故蔗糖中一定含有碳、氢元素，可能含有氧元素．

看图，选择合适的短语完成对话。

rainy weather   fly kites   an umbrella   sunny days   ride bikes

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；2.只允许修改10处，多者（从第11处起）不计分。

    An opening week held in our school last week so that we could show a great achievements we made in art education.

    The art works exhibition went on from Monday to Friday, exhibit the excellent art works, such as paper cuts, paintings and flower arrangements. Both of the art works were created by the students of our school. That attracted the public most was the singing and dancing performances in Friday afternoon. All these activities draw the close attention of the public and parents as well, receiving high praises from the public.

    Through these activity, the public has a better understanding of our school. As a result of ,we all think that the opening week was of great successful.

“非典”肆虐时期，过氧乙酸（C₂H₄O₃）是被人们广泛使用的消毒剂，它无色且有刺激性气味，具有强氧化性，温度稍高即分解放出氧气并生成醋酸（CH₃COOH），请写出过氧乙酸分解的化学方程式　____ ．