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An 11-year-old boy named Charlie was walking on the beach when he found a strange rock. It was not a rock at all. It was a tooth of an ancient animal that lived millions of years ago. His mother sent photos to a museum. Experts(专家) studied the tooth carefully. They said it was more than two million years old. Charlie could not believe it. He said it was the best thing he had ever found.

1.1. What did Charlie find on the beach?

A A real rock.

B An old tooth.

C A sea shell.

解析：选B。B细节理解。根据原文“It was a tooth of an ancient animal that lived millions of years ago.”可知他找到的是一颗古老动物的牙齿。故选B。

2.2.What does the word “They” refer to?

A Charlie and his mother.

B The ancient animals.

C The museum experts.

解析：选C。C词义指代题。根据前一句“Experts studied the tooth carefully”可知，They指代the experts（专家们）。故选C。

3.3. How did Charlie probably feel about his find?

A Scared and worried.

B Surprised and excited.

C Bored and tired.

解析：选B。B推理判断。根据could not believe it和the best thing he had ever found可推断他感到惊讶又兴奋。

4.4. What is the best title for the passage?

A A boy’s special discovery.

B The history of elephants.

C A fun day at the beach.

解析：选A。A主旨大意。全文围绕男孩在海滩上的奇妙发现展开, A项概括全文。