Wow. It's amazing how a few months is all it takes to notice subtle differences in Sebastian's comprehension. I had previously asked him these questions a few months back and today I asked him the questions as they are stated and these are his answers:
The capital letters are where he answered the fill in the blanks:
I can drive a truck. I can carry... BOXES.
I can work outside. I can be a... WORKER.
I can work in a store. I can sell... PEAS.
I can make things. I can make... FLOWERS.
I can help people or animals. I can be a .... FIREMAN.