Finally,the thief handed everything（that ）he had stolen to the police.
d that 定语从句,先行词是不定代词,所以用that做关系词
The last time we had great fun was (when ) we were visiting the park.
c when 是一个表语从句.主语是the last time ,系动词是is,when是关系词
Finally,the thief handed everything（that ）he had stolen to the police.
d that 定语从句,先行词是不定代词,所以用that做关系词
The last time we had great fun was (when ) we were visiting the park.
c when 是一个表语从句.主语是the last time ,系动词是is,when是关系词