The following sentences are correct, with explanations:
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The clothes, which are dirty, won't all fit in the washing machine. (Correct)
- This sentence is correct because "which" is used properly to introduce a non-restrictive clause that adds extra information about the clothes.
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My cat, that mostly stays outside, climbs on the window when she wants to come inside. (Incorrect)
- This sentence is incorrect because "that" should be used for restrictive clauses. The correct word here would be "who" or "which", not "that." A better option would be: "My cat, who mostly stays outside, climbs on the window when she wants to come inside."
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My family adopted a dog that is a Dalmatian and Retriever mix. (Correct)
- This sentence is correct as "that" is appropriately used to introduce a restrictive clause describing the dog.
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I need shoes which are more comfortable for the marathon. (Incorrect in American English)
- While this construction is often accepted in British English, American English typically prefers "that" when referring to essential information about the noun. In American English, the correct sentence would be: "I need shoes that are more comfortable for the marathon."
So, the correct sentences are:
- The clothes, which are dirty, won't all fit in the washing machine.
- My family adopted a dog that is a Dalmatian and Retriever mix.