试题题干
All the apples （ ）fell down from the tree were eaten up by the pigs.
参考答案
正确答案：
试题解析
当定语从句的先行项前有all修饰时，关系词应用that，其在定语从句中作fell down的主语。
句意：所有从树上掉下来的苹果都被猪吃光了。
All the apples （ ）fell down from the tree were eaten up by the pigs.
当定语从句的先行项前有all修饰时，关系词应用that，其在定语从句中作fell down的主语。
句意：所有从树上掉下来的苹果都被猪吃光了。