Answer:
What has two heads but only uses one
What do you call two witches who live together?
What is the cleanest language in the world?
What can you add to a bucket full of water to make it lighter?
I walk on 4 legs in the morning, 2 legs at noon, and 3 legs at night. What am I?
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths.