根据下列句子及所给汉语注释，在答题卡指定区域的横线上写出空缺处各单词的正确形式，每空只写一词。
66．I had a long talk with the ________ （校长） about my son．
67．________ （正义） has long arms．
68．Coal has been ________ （开采）since the sixteenth century in this area．
69．The tablets should be taken ________ （两次）a day．
70．People were too polite to correct my ________ （语法） when I spoke English．
71．It’s not that I don’t like him – on the ________ （相反）, he seems very pleasant．
72．My thoughts ________ （漫游）from the exam questions to my interview the next day．
73．They are ________ （挣扎） to keep their heads above the water．
74．They ordered Chinese food, and when it arrived they ate ________ （饥饿地）．
75．She ________ （耽搁）for two hours and missed the train．