He is worried, nervous and anxious to be put in jail again. He expresses that his heart is beating strongly in his chest. Nor has he had the courage to tell what really happened.
The donalban's fear is that the murder is still among them and they do not want to risk their lives by staying around
The answer could actually be "climb" or "was climbing," but traditionally should be "climb." Hope this helps :)
The misplaced modifier is Overcooked.
The correct sentences is: "Gwen took the overcooked cookies out of the oven."