1) Experts say that comets and asteroids could ___.

A. wipe out all animal life, leaving only plants

B. kill a significant proportion of the Earth's human population

C. put an end to all plant and animal life on Earth

D. cause as much damage as the Hiroshima bomb
2) A small asteroid ___.

A. can still cause a lot of damage

B. is not a problem if it is spotted early

C. cannot cause any significant harm

D. is actually more dangerous than a larger one

3) Earth has been relatively safe thanks to ___.

A. pure luck

B. luck and the protective force of another planet from our solar system

C. early warning systems set up by NASA

D. luck and our position in relation to the sun​

 Hi, I am Ray. My Dad is not a famous person or a national hero. But he is my hero! He is always fun. I can play-fight him and he doesn't mind. He isn't a person who won a championship or walked on the Moon or saved people in trouble but he is kind and clever and he is never bored to be with. My best days are the days that I spend with my father. He knows a lot about space exploration and the achievements of scientists. I like his stories about space expeditions and astronauts.Sometimes my friends join us to listen to his stories and I am proud of my Dad.

Kurt Cobain was a prominent American musician, rock singer and guitarist. He was probably best known for the rock-project called “Nirvana”. Born in Aberdeen, Washington, he had many European roots: Irish, Scottish, German, English. His Irish ancestors migrated to Canada in the 19th century and then moved to the USA.
Curt was born on February 20, 1967, in a humble family. His mother was a housewife and his father was a mechanic. However, he had some other relatives who were involved in music industry. For example, his uncle was from the “Beachcombers” band, his aunt played the guitar in various local ensembles.
He started showing interest in music at a very early age. When he was two he enjoyed singing “Beatles” songs, when he was seven he got his first drum as a present from his aunt. When he was nine his parents divorced and it had a bad impact on him. He became sullen and unhappy. His life was a mess as a teenager. At first he lived with his mother, then he moved in with his father. After his favourite uncle committed a suicide he became even more disturbed.

In 1985 he established his first band “Fecal Matter”, which didn’t last. The second band was more successful. Changing several titles, it was called “Nirvana” and in 1988 they released their first single, a year later - an album “Bleach”. The second album “Nevermind” was highly demanded. It brought Cobain’s band not only commercial success, but also world fame. His personal life was connected with Courtney Love. A couple met in 1989, but it wasn’t until 1991 that they started dating. A year later they got married, as Courtney was pregnant.