Выберите подходящее местоимение. 1. Your dictionary is new, but (my, mine)

Изберите соответствующее местоимение. 1. Your dictionary is new, but (my, mine) is not. 2. She says that this dictionary is (her, hers). 3. You can do it without my help, but not without (theirs, their). 4. Will you help me to sort out the things? I cannot tell which are (your, yours) and which are (our, ours). 5. He is an old friend of (me, mine). 6. Do you know your lesson today? He does not know (him, his). 7. This is your notebook and this is his, but where is (her, hers)?