·單詞

hot adj.????帶電的，充電的；溫度高的

fireman n.????消防隊員

????·a fireman

????·two firemen

cause v.????引起；n.????原因、起因

????·v.????引起????Carelessness causes accidents.????粗心大意引起交通事故

????·v.????起因????the cause of the fire????這些火的起因

examine v.????檢查

????·examiner n.????主考官

????·examination n.????檢查，考試?？煽s寫成?exam

accidentally adv.????意為地，偶然地

????·accidental?adj.????意外的

????·accident n.????意外

????·do sth. accidentally????偶然做某事

????·do sth. by accident? ?偶然做某事

????·do sth. by chance? ? 碰巧做某事

remains n.????尸體，殘骸

????·the remains of a snake

? ? ·remain v.????保持，保留

????????·remain silent????保持安靜

wire n.????電線

????·wireless adj.????無線的

????????·wireless network/mouse/keyboard????無線 網(wǎng)/鼠標/鍵盤

volt n.????伏特（電壓單位）

power line????電力線

solve n.????解決

????·solve the mystery????解開謎團

????·solve the problem of ...????解決 … 的問題

????????·solve the problem of air pollution/earthquake????解決 空氣污染/地震 的問題

mystery n.????迷

snatch v.????抓住

spark n.????電火花

·本課句型

一般過去時????????????did

現(xiàn)在完成時????????????have/has done

現(xiàn)在完成進行時????have/has been doing

名詞修飾名詞（復數(shù)通常后面的名詞變復數(shù)，前面的名詞不變）

????·forest fires????森林火災

????·cigarette ends????煙頭

·課文

????At last firemen have put out a big forest fire in California. Since then, they have been trying to find out how the fire began. Forest fire are often caused by broken glass or by cigarette ends which people carelessly throw away. Yesterday the firemen examined the ground carefully, but were not able to find any broken glass. They were also quite sure that a cigarette end did not start the fire. This morning, however, a fireman accidentally discovered the cause. He noticed the remains of a snake which was wound round the electric wires of a 16,000-volt power line. In this way, he was able to solve the mystery. The explanation was simple but very unusual. A bird had snatched up the snake from the ground and then dropped it on to the wires. The snake then wound itself round the wires. When it did so, it sent sparks down to the ground and these immediately started a fire.

broken glass????碎玻璃

cigarette ends????煙頭

throw away????扔掉

wound round????纏繞：指物體圍繞另一個物體的表面旋轉(zhuǎn)，形成緊密的連接

electric wire????電線

snatch up????抓起

be able to do????能夠做

explanation n.????解釋

explain v.????解釋

on to 和 on

????·on????靜態(tài)的在 ... 上面

????·on to????動態(tài)，后來到 ... 上面

wind????wound????wound

·知識拓展

比較 throw to/throw at/throw away

throw away????扔掉

????·Forest fires are often caused by cigarette ends?which people carelessly throw away.

throw to? ? 朝著 ... 扔東西

????·He threw the ball to me and I caught it.

throw at????瞄著點 ... 扔東西

? ? ·The boy threw a stone at the window and broke?it.

比較 quite/quiet

quite?adv.????相當，很；非常

????·They were also quite sure that a cigarette end did not start the fire.

quiet?adj.????輕聲的，安靜的；n.????安靜，靜謐

????·The class kept very quiet during the lesson.

比較 drop/fall

drop?vi./vt.????投，丟（把別的東西扔掉）

????·A bird had dropped the snake on to the wires.

fall?vi.????降落，落下（自己掉落）

????·He fell down the stairs and broke his leg.