根据下列句子所给汉语意思或单词首字母，写出空缺处各单词的正确形式。 1. The headmaster wants to have the opening speech d______ by our English teacher next month. 2. Dr Yuan searched for a way to increase rice harvests without _____ (扩大) the area of the fields. 3. The problem is so ______ (令人迷惑) that few people can work it out. 4. There is a general ______ (信念) that things will soon get better. 5. The boy lifted the stone with all his ______ (力量). 6. Many of the young ______ (一代) enjoy foreign music and films. 7. I know you don`t like her but try not to make it so ______ (明显). 8. A recent survey showed that 53.3 percent of China's middle-class people were not s______ (满意) with their physical and mental conditions. 9. World Expos have excited and______ (鼓舞) more and more people in the world. 10. By r______ (减少)excess emissions (过度排放) of greenhouse gases, we can put the low-carbon lifestyle into practice gradually.