Answer — Exercise 7
Revision 5·Wider World 4 - Student's Book
Pregunta
Listen. Then listen again and write down what you hear.
Respuesta
Space is much bigger than the galaxy where we live. If you wanted to count all the stars, it wouldn’t be easy. In fact, astronomers can’t count them, even with strong telescopes. That's because there are millions of stars and most of them are light years away from Earth.