Changing one letter in each line turn the word cat into

Changing one letter in each line turn the word cat into pen. The asterisk shows which letter should be changed. The sentences on the left can help you to find the right word. You get 1 point for each right variant. C A T 1) Dicks ... is black. 2) Look at the ... . 3) Our teacher is a ... . 4) I see four .... in the street. P E N