Relative pronouns that and which

[Katia]

Test No. incompl/elem-39 "Relative Pronoun Exercises", question 8

Yes, it's the best car ......... I've ever had. Why do you ask?

(a) which
(b) that
(c) who

Test No. incompl/elem-39 "Relative Pronoun Exercises", answer 8

Yes, it's the best car that I've ever had. Why do you ask?

Correct answer: (b) that

Your answer was: incorrect
Yes, it's the best car which I've ever had. Why do you ask?
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Hi! Can you explain, please, which is the differnce between "which" and "that"? Thanks in advance!

[Alan]

Hi Katia,

You need that here because it comes after the best, which is the so called superlative form of the adjective. If you want more information, have a look on this site for esl lessons and then look in the index and you can see some notes I've written and a story about relative pronouns - that which who etc.

Alan
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English as a Second Language
You can read my ESL story Present Simple

[Maria Sarmento]

I would be grateful for more information about the diference in this context between "that" and "which".

[Farzana Liaquat]

I also cannot understand the correct use of "that" and "which". Please explain the difference.
Thanks.