IV. Read the following passage and then decide whether the sentences are true or false according to the passage
Our planet Earth is one of nine planets revolving around the sun, a fairly small and ordinary star, which lies in the outer areas of the Milky Way Galaxy. There are about 250 billion stars in our galaxy, and billions of galaxy in universe. People have always wondered about the possibility of intelligent life forms on other planets. In recent years, this has become serious scientific speculation. Some scientists believe that there must be large numbers of stars with planets which could support living intelligent beings. Perhaps we shall never know. The nearest star is 4.3 light years away. A light year is the distance covered by light (travelling al almost 300,000 kilometers a second), in one year. It would take the fastest Earth spacecraft about 40,000 years to reach the nearest star. For a number of years radio telescopes have been trying to pick up signals from outer space, so far without success. There are, however, millions of possible radio frequencies, and there is no reason why a completely alien civilization should not use a different type of communication, such as X-rays or even a type of wave we have not yet discovered. Suppose contacts were made with beings 300 light years away. By the lime we had sent our reply, and received their response the earth would be 600 years older. It would be an interesting, but rather slow moving conversation!
1. Nine planets but the Earth move around the sun.
2. Scientists doubt if there is intelligent life on other planets.
3. It wouldn’t be possible for the very person who sent a message to even the nearest star to receive a reply from it.
4. The universe is immense.
5. We still haven’t received any signals from outer space.
