LeonardodaVinci（1452-1519）    birdskeptincagesinorderto...

问题详情：

Leonardo da Vinci（1452-1519）     birds kept in cages in order to have the pleasure of setting them free.

said to be buying                  said to have bought

said to buy                       said to have bought

【回答】

B

知识点：非谓语动词

题型：选择题