All the apples () fell down from the tree were eaten up by the pigs.

问题描述:

All the apples () fell down from the tree were eaten up by the pigs.
选which 还是 that 还是 /(省略)
请分别说明下原因,
我比较混乱
用that 那which 和/错在哪里?

用that,这个是定语从句
定语从句的关系代词 that的用法:若先行词指人或物则代替先行词在定语从句中充当主语或宾语