定语从句‘It's the room that you can study in.’有没有错误?

定语从句‘It's the room that you can study in.’有没有错误? It's a pity..的疑问It's a pity he couldn't visit Mary.这是个定语从句吧?I could drive a car by the time I was sixteen.这是什么从句? It's a pity..的疑问It's a pity he couldn't visit Mary.这是个定语从句吧?I could drive a car by the time I was sixteen.这是什么从句? The pen on my desk,it isn't mine合并成定语从句 that's why i didn't see the sign这是定语从句吗~怎么理解 The skirt is very expensive.It's made of silk.(合并成定语从句) 用定语从句合并：The room is comfortable.I sleep in the room. 合并成含有定语从句的复合句：I can't stand this kind of music.It's too noisy It's the third time __________you made the same mistake.请说明理由,究竟是不是定语从句? what's wrong with the computer? It was used to collet information for the project的定语从句 定语从句：in the room there are many tables__________you can sit and read.Ain which Bon which Cof it Dat which 那个,请说明原因是什么 The room is mine.The window of the roorn faces south 改为定语从句! The knife is very sharp.we often use it t cut bread.用定语从句的形式表达 The train has just arrived but they don't notice it 这句话是不是限定性定语从句,或非限? It’s a good habit to t...the room every day. Thanks to Maggie's timely help,___we couldn't have finished the work on time.定语从句! It's the subject that I am best at.此句英文是强调句还是定语从句 The key opens the room is missing.哪错了?从定语从句方面考虑。