Exercise 3. Read the text and answer questions. Are there intelligent beings on the planets in our solar system? Most scientists do not think so. If there are, the only likely place is Mars. It is fun to imagine our kind of humans on other worlds, but they would probably look so different we might not recognize them as people at all. Living things have a wonderful way of adapting themselves to conditions around in order to stay alive. Plants grow in the Arctic. Some simple animals can survive being boiled or frozen. Creatures live in the blackest deeps of the sea under thousands of tons of pressure. We cannot really state that our kind of air is the only kind living things could breathe or that they must have water or certain climate. Creatures that breathed other gases or lived in other temperatures, however, would not look like us. Are there people anywhere else in the universe? Maybe there are. In our own galaxy, there are billions of stars. Some must have planets with conditions like those on earth. Somewhere in space, there could be other thinking beings. If their planets are older, they may know more than we do. They may be a traveling in space. 1. Scientists think that on other planets in our solar system there are _______ A. probably some other intelligent beings. B. probably no other intelligent beings. C. certainly some other intelligent beings. D. certainly no other intelligent beings. 2. Scientists think that any intelligent beings on other planets in our solar system. A. would live under thousands of tons of pressure. B. would be very different from us. C. would already be traveling in space. D. would have adapted themselves to conditions better than we have done. 3. What do creatures do to stay alive if conditions around them change? A. to travel in space. B. to grow in the Arctic. C. to go to other worlds. D. to adapt themselves. 4. The bolded word "They" in the passage refers to A. planets. B. conditions. C. other thinking beings. D. billions of stars. 5. Other human beings live A. possibly on other planets of stars in our galaxy. B. possibly on other planets in our solar system. C. possibly on other stars in our own galaxy. D. everywhere in the universe.