Passage Two
The diamond is considered the most famous and valuable jewel in the world.
[29]Diamonds were made as a result of great volcanic heat and pressure. A volcano is a mountain with a hole in the top. When a volcano is very active it sometimes explodes and causes great damage.
Diamonds were pushed towards the surface of the earth-millions of years ago-by a number of great volcanic explosions. [30]It is in the narrow volcanic pipes that diamonds are found. They are also found among the sand and stones of certain riverbeds, and in a few places on the floor of the sea, for they were washed down the mountainsides by the rain.
Diamonds are very rare. There are not many diamond pipes or diamond-producing rivers in the world. During the last century, adventurers from Europe went to Brazil, because they had heard that there were diamonds in the River Amazon. [31]Most of these early diamond miners died of illness or were lost forever in the great forests. But some returned home rich.
[32]The earliest known diamonds were found in India many centuries ago. The most recent and exciting discoveries have been made in Eastern Russia. But most of the world's diamonds now come from the Congo, from Tanzania-which has the largest diamond mine in the world-and from South Africa.

Questions 29 to 32 are based on the passage you have just heard.
29. What does the speaker say about diamonds?
正確答案：B
解析：短文說，鉆石是火山熱和壓力的產物。所以B正確。選項都與鉆石的情況有關，可猜測題目的內容。答案中的heat and pressure是文中的原詞。重要信息往往不止出現一次，后文中的great volcanic explosions再次強調成因。
30. Where can diamonds be found?
正確答案：C
解析：短文說，鉆石是在狹窄的火山筒被發現的。所以C正確。選項為地點，可預測考查的是鉆石的出處。注意聽原文中的地點，做好筆記。
31. What happened to most of the adventurers from Europe?
正確答案：A
解析：聽到文中提到大多數早期鉆礦工人died或lost時就應該可以推斷出“他們沒有能夠帶著夢寐以求的鉆石回到家鄉”，即A。選項描述的是They的命運。仔細聽音，即可準確作答。D指的是some的命運，但content和millionaires沒有依據。
32. According to the speaker, in which country were the earliest known diamonds found?
正確答案：C
解析：短文說，最早的已知鉆石于幾個世紀前在印度被發現。所以C正確。選項都是國家或地區的名稱，猜測題目可能問地點。邊聽邊做筆記，把聽到的國家或地區所出現的情況和各選項一一對應，即可準確作答。