Last night it snowed heavy. When Susan and I got up in this morning, we found the whole garden was covered with thick snow. So we decided clear the path. We got two spades but began our work at once. We both worked so hard that the path was clear soon. Seen this, our father felt very surprising. He smiled happily at us, telling us that we have done a good job and that he was proud for us. Finally Father gave us some pocket money as a reward for the Spring Festival. Susan and I was happy because we had all got the money through labor.heavy改为heavily
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(答案→)heavy改为heavily
解析：
【小题1】heavy改为heavily 用副词heavily修饰动词snow，在句中作状语。
【小题2】去掉in 固定短语this morning在句中单独做状语，不需要介词in。
【小题3】decided后面加to 动词decide和不定式连用，形成decide to do sth决定做某事。
【小题4】but改为and 上下文之间存在着并列关系，我们有两个铲子立刻就开始了工作。
【小题5】seeing改为seen 动词see与句子主语our father之间存在着主动关系，故使用现在分词做状语。
【小题6】surprising改为surprised 本句句子的主语是our father，表示的是人，故使用过去分词surprised形成的形容词作表语。
【小题7】have改为had 本文的基本时态是一般过去时，故使用了过去式。
【小题8】for改为of 固定搭配be proud of…对…感到自豪。
【小题9】was改为were 本句的主语是Susan and I做主语，谓语动词使用复数形式。
【小题10】all改为both 本句主语we是指Susan and I，表示两者都使用的是both。