题目内容
Loulan, once a small, wealthy commercial city, is believed by many people___________over gradually by sandstorms from AD 200 to AD 500.
A.covered | B.was covered | C.to be covered | D.to have been covered |
D
解析
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题目内容
Loulan, once a small, wealthy commercial city, is believed by many people___________over gradually by sandstorms from AD 200 to AD 500.
A.covered | B.was covered | C.to be covered | D.to have been covered |
D
解析