English Conditionals exercise

English Conditionals exercise. Choose the right halves of sentences to complete the various conditional sentences in English.
If you give me $20
If I had noticed the door was open
If you told me you'd seen a ghost
If I had had more money
If you leave the key under the doormat
If she had told me her life story
Unless my watch is wrong
If I knew how to repair it
If he hadn't told the truth