题目

根据下列句子及所给汉语意思，在句子的横线上写出各单词的正确形式。每空只填一个词，并将答案写在答题卡上。 71．Nelson Mandela called on the black people to fight for ________（平等的）rights. 72．The Christmas Eve is drawing near. Have you ________（装饰）your Christmas tree? 73．Several companies are________(竞争) for the contract. 74．The train must stop when the________(信号) is red. 75．Eating sweets occasionally doesn't do children any________(危害)． 求方程x2－x－1＝0的一个近似解．(精确到0.1)