问题补充：
The old house with a garden 80 years ago．
A. built
B. build
C. was built
D. is built
答案：
A. built
B. build
(答案→)C. was built
D. is built
解析：句意：带有花园的这座老房子是在80年前被建造的。动作的承受者作主语，用被动语态。其结构是，主语+be+done.主动语态有的时态被动语态 也有。80 years ago，过去时态的标志词，故应该用过去时态的被动语态。故选C
