完成句子

阅读下列各小题，根据汉语提示，括号内的英语单词完成句子，并将答案写在答题卡上的相应题号后。

例：We      (起床) before dawn, It was still dark outside. (get)

答案：got up

71．When his mother came home from work, he was lying on the sofa,       his book. (absorb)

    母亲下班回家的时候，他正躺在沙发上专心致志地看书。

72．I think that it is I rather than my sister       what has happened. (blame)

    我认为出了事不能怪姐姐而应该怪我。

73．Hardly        the sports meeting open when the rain began to pour down. (declare)

我们一宣布运动会开幕，天就开始下起大雨来了。

74．He knows so much about this problem. He         a lot of books! (refer)

    他对于这个问题知道得这么多，他一定是翻阅了大量的书。

75．But for you timely encouragement, I        after going through so much difficulty. (lose)

    要不是你及时鼓励，经历这么多的困难之后我早就灰心了。

76．I developed very slowly and        I was built as an analytical machine by Charles Babbage. (take)

    我发育缓慢，差不多花了两百年时间查尔斯巴比奇才把我制成了一台分析机。

77．My friend dreamed of earning a big sum from the stock market        his own business. (start)

我的朋友梦想着在股票市场赚一大笔钱，他可以用来自己创业。

78．      in the government report, teenagers education decides a country’s future. (stress)

正如政府工作报告中强调的那样，青少年的教育决定着国家的未来。

79．I was very nervous because it was the first time that I      an opening banquet. (invite)

我很紧张是因为那是我第一次受邀参加开幕盛宴。

80．       is that the continue presence of water allows the earth to dissolve harmful gases and acids into the oceans and seas. (believe)

    很多科学家相信，由于地球上长期有水存在，使地球得以把有害气体和酸性物质溶解在海洋里。