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We have a new find at Sanxingdui. Some old iron pieces were found in Pit 7 of Sanxingdui.

Scientists say these iron pieces are from outer space. They are very old, from the late Shang Dynasty (商朝) (about 3,000 years ago). Ancient Shu people thought these iron pieces were precious gifts from the sky.

Scientists think this iron thing may be a ritual weapon (礼仪兵器). It may also be used to make bronze (青铜) things, because it is very hard.

This discovery is very important. It shows ancient people in Sichuan used iron from space. It fills a gap in the history of using iron in Southwest China.

1.1. The iron pieces come from ______.

A the sea

B space outside Earth

C the mountain

D old houses

解析：选B。B细节理解题。第二段提到“these iron pieces are from outer space”，和B选项“space outside Earth”意思一致；文章没有提到铁片来自大海、山里或老房子。故选B。

2.2. The iron pieces have a history of about ______ years.

A two thousand

B three thousand

C four thousand

D five thousand

解析：选B。B细节理解题。第二段明确写出“about 3,000 years ago”，对应B选项三千年；文中没有出现两千、四千、五千年的相关内容。故选B。

3.3. The iron pieces can help make bronze because they are ______.

A soft

B light

C strong

D cheap

解析：选C。C细节理解题。第三段说明可以用来制作青铜器的原因是“it is very hard”，hard 和C选项“strong”同义；柔软、轻便、便宜都不是原文给出的原因。故选C。

4.4. This passage is most likely taken from ______.

A a storybook for kids

B a sports magazine

C a travel guide book

D a science and history report

解析：选D。D推理判断题。文章介绍三星堆考古发现、天外铁片的来历、用途和历史意义，属于科学历史类内容，最有可能选自科学历史报道；文章不是儿童故事、旅游指南也不是体育杂志内容。故选D。