题目内容
When last ________ valuable, those books enjoyed great success.
[ ]
A.
finding
B.
found
C.
being found
D.
to be found
答案:B
解析:
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。 |
练习册系列答案
相关题目