77．The company mainly______(出版)books for children every year．

76．As far as I know，this scientist has made quite a few important______(发现)in

this field．

75．Children are often c_______about everything．They will keep asking questions．

74．He hurried here i______ he heard the news．

73.There were about 300 students from our school a_______the lecture yesterday．

72．Now the girl is in hospital recovering from liver f________.

根据首字母或所给汉语写出空缺处单词的适当形式，使句子完整。每空一词。

71．He always fails exams,for he spends little time making enough p________for his examinations．