Definition: used at the beginning of a relative clause to show what thing is being referred to Level: A2
这是我昨天找到的那把钥匙。
This is the key ___which I found yesterday.
这些是我烤的饼干。
These are the cookies ___which I baked.
你借给我的那本书很棒。
The book ___which you lent me is great.
