Today I took part in the English singing petition of our school. Most of the singers and audience have been there when I arrived at the ball. See the large audience, I started to feel little nervous. After some times, it was my turn to sing. When the host read my name out, the audience burst into a great cheer, and my heart began to beat really fastly. The song I sing was Country Road, that is a very famous piece of American country music. I had practiced for it many times, and I didn’t think I had done a very good job. Anyway, I was still very excited because of participating was the most important thing to me.Have---had
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(答案→)Have---had
解析：文章讲述作者参加歌唱比赛的事情，因为紧张，作者认为唱的不太好，但是他还是很兴奋，因为他认为最重要的是参与。
【小题1】当我到的时候，大多数歌手的观众都已经到了。说明歌手和观众在作者到之前就到了，用过去完成时：Have---had
【小题2】看见这么多观众，我开始有点紧张。用现在分词做状语：see—seeing
【小题3】feel后面加a，因为a little“一点”，修饰形容词
【小题4】过了一段时间，该轮到我唱了。Some times几次，some time一段时间
【小题5】我的心跳得很快。Fast副词
【小题6】我唱的歌是《乡村小路》，叙述过去的事情，用一般过去式：sing—sang
【小题7】这里考查非限制性定语从句，先行词是Country Road,，定语从句中没有主语，非限制性定语从句不能用tha引导，用which
【小题8】我练习了很多次。Practise是及物动词：去掉for
【小题9】但是我想我唱的不好。两句话是转折关系：and—but
【小题10】我很兴奋因为参与是最重要的事情。Because of是介词短语，不能接从句，because后面可以接从句。