The telescope __________ (build) last year cost him a lot of money.
答案是built 我填了was built
请问为什么不能填was built ，build没有被动形式吗？
參考答案:有被动式
这句话里built只是过去分词作定语修饰主语而已
如果句子没有cost him a lot of money就可以说：
the telescope was built last year.
The telescope __________ (build) last year cost him a lot of money.
答案是built 我填了was built
请问为什么不能填was built ，build没有被动形式吗？
參考答案:有被动式
这句话里built只是过去分词作定语修饰主语而已
如果句子没有cost him a lot of money就可以说：
the telescope was built last year.