1 Look, I've seen a UFO, a flying saucer, right over the tower!
2 Guess what! I've seen a live crocodile in our river. It was floating down the river, with its head slightly above the surface of the water.
3 This book was found in the cellar by my dad. It looks very old. It probably dates back to the nineteenth century.
4 The walls of the cave are covered with drawings. They look unusual and very
5 Look at these huge stones. They are arranged in a circle. It looks like ancient people used it as a primitive clock or a calendar.
a) You are always telling these silly stories. You must have taken a floating log for the animal.
b) Some ancient tribes might have created them. I'd like to go and see that prehistoric gallery myself.
c) Calm down. It must have been a cloud of a peculiar form.
d) My grandma told me that there had been a big round water house here, a special construction to keep some water supply in case of a drought. They must have destroyed it during the war. And these stones are from the foundation of the water house.
e) It looks like that. People who lived in this house before you might have left it there.
b) Suggest a more or less probable explanation for these two facts (as it was done in the exercise above).
— I've got a feeling that someone has broken into my house. Look, the light is on in the kitchen!
— I saw a yeti, a huge ape, in our park! It was two meters tall and ran away as soon as it saw me.