英语：All the apples () fell down from the tree were eaten up by the pigs.
问题描述：
英语：All the apples () fell down from the tree were eaten up by the pigs.
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
答
这个没什么纠结的
all修饰的先行词
关系代词固定用that