Question

【題目】Steel is a hard metal that people use to make many different products. Car bodies, bridges, building frames, and containers are just a few of the things made from steel. 【1】 But steel is better than iron in many ways. Steel is stronger but lighter than iron. Steel also lasts longer than iron.

【2】 Then they add carbon to the liquid iron. They may also add other materials to make different types of steel. For example, steel with added chromium（鉻）is called stainless steel. It will not rust（生銹）or stain. Finally, workers use machines to cool the liquid steel into bars or long sheets. 【3】

People made the first steel as early as 1400 BC. Ancient people heated iron inside a pile of burning charcoal（木炭）. 【4】. The result was not the same as modern steel, but it was stronger than regular iron.

In the 1800s people began to use huge ovens to make large amounts of steel. In the late 1800s builders used steel to make some of the first skyscrapers. 【5】. In the 1900s new processes made steel-making easier. Today steel remains one of the most popular building materials in the world.

A. This added carbon to the iron.

B. Steel is quite different from iron.

C. The hardened steel may then be made into products.

D. Steel is basically iron mixed with a little carbon.

E. Then they will be cooled and put on the market.

F. To make steel, workers hear iron until it melts.

G. They also used steel to make large, modern bridges.

Answer 1

【答案】

【1】D

【2】F

【3】C

【4】A

【5】G

【解析】這是一篇敘述文。本文主要講了鋼的制作過程，歷史，以及鋼的作用。鋼在現代的作用越來越大。

【1】上一句提到了鋼，下一句提到鋼與鐵的比較，所以該句是承接下文，表達的是鋼與鐵的關系。D選項“鋼是含有少量混合物的鐵。”切題。

【2】該句是標題句。下文主要講的是鋼是如何制成鐵的。所以F選項“為了制作鋼，工人們要加熱直到鐵融化�！鼻蓄}。F中的to make steel與文中的 to make different types of steel.相呼應。

【3】上一句提到“工人們使用機器將鋼水冷卻成條形或長條形。”而接下來這些鋼將會被制成產品。所以C選項“更堅硬的鋼可能后面會被制成產品�！鼻蓄}。

【4】上一句提到“古代人在一堆燃燒的木炭（木炭）里面加熱鐵�！彼�以鐵里含有碳。A選項“這把碳加入了鐵中。”切題。

【5】該段講了鋼的作用。上一句提到了鋼可以制造摩天大樓。所以該句也應是鋼的作用。G選項“他們也用鋼制作大的，現代的橋�！鼻蓄}。