B) Fill in the blanks with the proper conjunctions to complete the sentences. Do not refer to the passage until you finish your exercise. 用恰当的连词填空，完成练习后再对照课文，核对你的答案。
1. Stonehenge, a rock circle, is one of Britain’s most famous historical places one of its greatest mysteries.
2. People like to go to this place especially in June they want to see the sun rising on the longest day of the year.
3. For many years, historians believed Stonehenge was a temple where ancient leaders tried to communicate with the gods. , historian Paul Stoker thinks this can’t be true Stonehenge was built so many centuries ago. “The leaders arrived in England much later,” he pointed out.
4. They think the stones can prevent illness keep people healthy. “ you walk there, you can feel the energy from your feet move up your body,” said one visitor.
5. No one is sure what Stonehenge was used for, most agree that the position of the stones must be for a special purpose. Some think it might be a burial place a place to honor ancestors.
6. One of the greatest mysteries is how it was built the stones are so big heavy.
7. In 2001, a group of English volunteers tried to build another Stonehenge, they couldn’t. “We don’t really know who built Stonehenge,” says Paul Stoker. “ perhaps we might never know, we do know they must have been hardworking—and great planners!”

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