Put in: who or which. 1. She returned me the book … I gave her yesterday. 2. Do you know the student … has won the first prize in the competition? 3. The mother tongue is a language … a child learns naturally, in his/ her famil...

Put in: who or which. 1. She returned me the book … I gave her yesterday. 2. Do you know the student … has won the first prize in the competition? 3. The mother tongue is a language … a child learns naturally, in his/ her family. 4. I knew a lady … played tennis every day. 5. Kate found a bag … she liked.