Question

根据汉语提示并用所给的英语单词完成句子．

Every year one million tourists visit Stonehenge, which is believed ________ before the Pyramids, about 4000 years ago．(construct)

每年大约有一百万游客参观巨石阵，据说它是在四千年以前被修建，早于埃及的金字塔．

Answer 1

答案：
解析：

to have been constructed