1. ____________when heated 遇热则膨胀
2. ____________against all difficulties 同一切困境作斗争
3. ____________the wage gap 缩小工资差距
4. ____________quickly 迅速传开
5. ____________the importance of these 强调这些的重要性
6. much to my____________ 很抱歉
7. cause a good deal of____________ 引起了不少闲话
8. do a lot of damage to the___________ 严重毁坏了农作物
9. in the past ___________ 在过去十年里
10. brave deeds in the ___________ 在那场战斗中的英勇事迹
