Read the following sentences: We were going to the supermarket and there was ___...

Read the following sentences:

We were going to the supermarket and there was _____ free parking space.
I wish I could take credit for this accomplishment, but my wife is the real hero. All the recognition should go to her, I don't deserve _______.
The candy we bought tasted bad. _______ was worth the money.
______ would have guessed that.

The words that correctly fill in the blanks respectively are: