Read the following sentences. If a sentences is correct, put a tick and if there is a mistake, underline the mistake and write the correct word or phrase in the space provided.
1. It's a piece of jewelry across which i came in an antiqua shop 
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​2. The extra work which she took on was starting to affect her health
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3. My mother, after whom i looked for over 20 years, died last year.
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4. The people whom i work with are all very friendly
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5. Some of the criticism with which they had to put up were very unfair
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6. He had many friends with whom he had a regular correspondence
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7. The woman to who he is engaged comes from Poland
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8. The forms which i had to fill in were very complicated
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9. I might fail the test, this will disappoint my parents
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10. She gives her children everything which they want
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