It is said that the old coinsunder the earth for about 100 years by the time they were dis

问题补充：

It is said that the old coinsunder the earth for about 100 years by the time they were discovered.

A. had buried

B. had been buried

C. buried

D. were buried

答案：

A. had buried

(答案→)B. had been buried

C. buried

D. were buried

解析：

这题考查动词的时态语态：金币是被埋葬，所以是被动式，而且时间是be+过去时间，所以用过去完成时的被动。选B。