) are from the 1800s when poor Chinese immigrants (移民) came to the US to build railroads or dig gold ……

since Earth was born. Most of it is in Earth’s core (核). It’s hard to dig out the gold there. Only... years later, we will have no gold to dig out.The rarer (更少见的) something is, the more valuable ……

was born. Most of it is in Earth’s core (核). It’s hard to dig out the gold there. Less than 1 percent..., we will have no gold left to dig out.The rarer (更少见的) something is, the more valuable it is. Gold ……

;__________________________________________3. When will we have no gold left to dig out?3. When will we have no gold...Why is gold so precious? (P4-5)Why is gold so precious? (P4-5)Complete the tasks:Complete the tasks ……

is a lot of gold in Earth's core._____It's easy to dig out gold in Earth's crust. _____It's easy to dig out gold in Earth's crust. _____Less than 1% of gold is in Earth's crust. _____Less ……

) comes to the village. He wants to 7.________________ the villagers and dig for gold underground....________________ the villagers and dig for gold underground.At this time, Ma Liang gets a 8.________ ……

fortune, fame, or both. Way back in 1849, hundreds of thousands started 7. ______ (dig) for gold in the great Gold Rush of California, a 8. ______ (history) event that captured the American imagination ……

and said, "My sons, there is a pot (罐子) of gold hidden in the olive orchard. Dig for it, if you want it."The sons tried to get him to tell them in what part of the orchard the gold was hidden; but he ……

is digging for gold. Jack digs a deep hole. He needs sleep. When Jack is asleep, along comes pirate Jade. 2 Jade begins to dig in Jack’s hole. She digs up a chest and opens the lid (盖子). Jack wakes up ……

Dig, dig, dig! Tim and his dog have fun. Tim digs up a lot of mud. Dig, dig, dig! His dog digs up a rag. Tim digs up a bus. His dog digs up a lid. Dig, dig, dig! A big box!And in it …. Lots of bugs ……

at the Exhibition Hall.dig v. 挖掘 (dug, dug)用法：短语：dig for sth 探矿；dig out 挖出。He has spent two hours in the garden digging for gold.cost v. 花费 (cost, cost)用法：用物做主语，用于：Sth cost sb + money 结构中。The road leads to a small ……

There is real1 gold in the sun. ……

dig here''. I dig and I find a big pot (罐子) of gold.""Yes, a strange dream," replied Hassan. "Why don''t you dig around that tree and see if it''s true?""My friend, it was just a dream and anyway ……

.Most gold is 6. ___________ in Earth’s core and hard to dig out. So it becomes even more 7... will happen when we dig out all of the gold in Earth’s crust?What will happen when we dig out all ……

. The son asked, “Dad, why don’t we dig out that annoying stone?” The father replied, “That stone... it will take to dig it out. Instead of digging it out for no reason, it’s better to be careful when ……