1．a　child是可数名词，且第一次在文章中出现，故用不定冠词修饰，表示“一个”好孩子。

　　2．Unfortunately　不幸的是，情况并非如此。根据逗号的提示可知，此处应用所给词的副词形式，修饰整个句子，作状语。再根据句意可知，应用Unfortunately。

　　3．confidence　my是形容词性物主代词，修饰名词，作定语，故用confidence。

　　4．shutting　shut和句子主语I构成逻辑上的主谓关系，故用现在分词作状语。

　　5．after　根据语境可知，此处应用连词after，表示“在……之后”。

　　6．depressed　由句子的主语I和该空前的逗号可知，应用形容词depressed在句子中作状语。

　　7．of　此处表示“最珍贵的时刻之一”，故用of。

　　8．had noticed　notice的动作发生在said之前，表示过去的过去，故用过去完成时。

　　9．hers　介词后跟名词、代词或动名词作宾语，且由空格前的“my hands”可知，此处用名词性物主代词hers, 表示她的手。

　　10．who　who引导非限制性定语从句，在从句中作主语，修饰先行词the headmaster。

　　.短文改错

　　(2016·唐山市高三一模)Tina and I had been good friend for years. We often did things together, so one day Tina didn't talk to me and just sat by herself. I don't know what was wrong. I thought about what I had done and said recent. Was Tina upset because I had done well in the history test than her? No, she was happy that I did well in school. I decided find out what was the matter. I walked over to there Tina was sitting. “Tina，” I said softly, “is anything wrong？” He answered sadly, “Yes, my cat died on last night.” I finally knew the reason what she didn't talk to me and comforted her.

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