5. The answer lies in two facts可以从两方面的事实中得到答案。 lie in = exist in 在于；（指事实） e.g. Hard work leads to success while failure often lies in laziness. 勤奋工作导致成功而失败往往在于懒惰。 The trouble lies in the engine. 毛病出在发动机上。The only way out we get rid of poverty lies in the development of education. 我们摆脱贫困的唯一出路在于发展教育. 睡懒觉；Mother let us lie in, but I got up for breakfast. 妈妈允许我们睡懒觉，但我为了吃早饭还是起床了。 **** lie with 在于；(指责任) e.g. The final decision lies with the committees. 最后由委员会作出决定。 Again we failed, and this failure lay with me. 我们又失败了，这一次责任在我。
6. The first is that it has stored supplies of fat in its body during the summer and autumn. 第一在夏秋两季，动物的体内储存了大量的脂肪。supplies of / a supply of 大量的；大批的； 既可以接可数名词，也可以接不可数名词。e.g. Have you got enough supplies of food? 你有足够的食品储备吗？
7. Some animals, including some bears, only half-hibernate. 有些动物，包括一些熊, 只是半冬眠。half-hibernate 半冬眠(复合动词)。 类似的复合词有： half-brother(异父母兄弟); half-price; half-way; half-hearted; half-mast (下半旗); half-breed (混血儿); half-cook (半熟); half-open; half-close;
8. It hides large quantities of nuts inside trees. 松鼠把大量的坚果藏在树里面。large / small quantities of = a large / small quantity of 大 / 少量的； 既可修饰可数名词，也可修饰不可数名词。用来做主语时，谓语动词与quantity的单/复数保持一致。e.g. He lost a large quantity of blood. 他失去了大量的血。 Please put a small quantity of sugar in my milk. 请在我的牛奶里放少许白糖。A large quantity of books was sent to the library. 大量的图书被送往图书馆。Quantities of food were on the table. 桌子上摆放着不少的食物。 ****表示“许多 / 大量” 的其它短语： many a + 单数可数名词，谓语动词用单数。 e.g. Many a student is in the classroom. 许多学生在教室里。 an amount of / amounts of + 不可数名词，谓语动词用单数。 e.g. He gave us an amount of / amounts of advice. 他给我们提了许多建议。 a number of / numbers of + 复数可数名词，谓语动词用复数。 e.g. A number of / Numbers of cars were destroyed in the earthquake. 许多车在地震中被毁了。 a great deal of + 不可数名词，谓语动词用单数。 e.g. A great deal of water has been polluted here. 这儿大量的水被污染了。 此外，a lot of / lots of 以及 plenty of 既可以修饰可数名词也可以修饰不可数名词。
2.