which, when, that, what

English grammar questions, answered by Alan

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johnbythesea
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which, when, that, what

Post by johnbythesea »

Hello, I have this sentence in an exercise book.

"the town is different to .... it was 20 years ago"

the options are which, when, that, what.

I really don't know the answer. Can someone help me and also explain why it is the correct answer.

Thank you
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Alan
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Re: which, when, that, what

Post by Alan »

what (= that which)
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