战争：战国时期，诸侯国之间战争的规模很大，参战兵力多，交战区域广，持续时间长。中国历史上一些著名战役，____之战、____之战、____之战等都发生在这一时期。

秦国崛起：战国中期以后，地处西部的____，逐渐成为实力最强大的诸侯国，对东方六国构成威胁。

如图所示的四种物态变化中，属于升华的是（　　）

根据句意及首字母或汉语提示完成单词
____ Luckily, the car a______ wasn't serious and nobody was badly hurt.
____ I will have an i______ tomorrow, so I need to get ready for it.
____ This is a piece of __________________(令人失望的) news.
____ Let's have a s_________party for Lana on her birthday. She will be very happy.
____ I think that’s a good _________(决定).