Li Yue and Zhang Hua went to︿nursing home and did some voluntary work on May Day. At their arrival, they were warm weled. They presented the elderly people with flowers and fruits. Then, they started working at once, cleaning the windows and swept the floor. Everything done, they sit in the yard chatting with the elderly. When it was time for the volunteer to leave, the elderly thanked them for their kindness. Li Yue and Zhang Hua were very happy because of what they did bring joy to others. It also enriched our own experience. They made a promise which they would e again to see the elderly whenever they were free.加a
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(答案→)加a
解析：
【小题1】加a 冠词的用法。他们两人去了一家养老院。
【小题2】at—on/upon固定短语的的用法。on/upon arrival 一到达就-----。
【小题3】warm—warmly形容词副词的用法。此处修饰be weled 应该用副词形式。
【小题4】swept—sweeping非谓语动词的用法。此处sweeping与cleaning 是并列现在分词做状语。现在分词做状语与句子的主语they之间是主动的关系。
【小题5】sit--sat时态语态。文章讲述的是on May Day的事情，所以应该是一般过去时。
【小题6】volunteer—volunteers名词的单复数。因为文章讲述的是他们两个人的事情，所以志愿者应为复数。
【小题7】去掉of连词的用法。因为后面是句子，所以此处应该用连词，而of之后为名词，动名词，或名词性质的短语。
【小题8】bring—brought时态语态的用法。what they did是句子的主语，此处bring是谓语，所以应考查时态，根据上下文应该是一般过去时。
【小题9】our—their代词的用法。上下文的逻辑应该是丰富了他们两个人的经验。
【小题10】which—that此处由that引导同位语从句，解释了promise的内容，没有什么疑问的意思。Which在名词性从句中必须做主语或宾语，而此句不缺少主宾，且没有疑问的意思，故不能用which.
考点:考查短文纠错