题目内容
When last ________ valuable, those books enjoyed great success.
- A.finding
- B.found
- C.being found
- D.to be found
B
解析:
分析句子的结构和逻辑关系,可以把when last…看成是一个省略句,相当于:When those books were found valuable,这里books与found是主谓关系,所以用过去分词。
解析:
分析句子的结构和逻辑关系,可以把when last…看成是一个省略句,相当于:When those books were found valuable,这里books与found是主谓关系,所以用过去分词。
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