Hold up. Some of these I got correct but didn't type the "right" combination of words to have it be accepted. Namely, for the bungalow and train questions. I tried typing, "There is no smoke," "There isn't any smoke," "An electric train doesn't have smoke," "No smoke," "None," etcetera. The same goes for the bungalow: "No stairs," "There are no stairs," "There aren't any stairs," "A bungalow doesn't have stairs." I would suggest that you accept a broader range of answers. As for catching a cold, that's a perfect answer but I tried sickness, illness, and germs to no avail. Please consider accepting those as well.