1. Choose the correct answer

21. According to the passage, what animals were dependent on deer as their food?
A) dogs B) cats C) wolves D) pigs


22. According to the passage, what would destroy the whole system?
A) feeding some birds
B) catching some ducks
C) destroying the land
D) killing some wolves


Read the text. Then choose the correct answer for each question below, according to the text (23-26).
Mark and Gerald are identical twins. Mirror images of each other, they also share many similarities in lifestyle. Mark hasn’t ever been married, and Gerald hasn’t either. Mark is a firefighter, and so is Gerald. Mark likes hunting, fishing, going to the beach, eating Chinese food, and watching John Wayne movies. Gerald does too.
These similarities might not be unusual in identical twins, except for one fact: Mark and Gerald were separated when they were five days old and grew up in different states with different families. Neither Mark nor Gerald knew that he had a twin. The two men found each other accidentally when they were thirty-one, and they discovered their almost identical lifestyles at that time.
Average people are fascinated by twins like Mark and Gerald. So are serious researchers. Identical twins share the same genes. Therefore, they offer researchers the chance to study the effect of genetic inheritance on disease, length of life, and personality.
23. Mark and Gerald share many similarities in lifestyle because . . .
A) they know each other very well.
B) they are identical twins.
C) they live in the same neighbourhood.
D) they are best friends.


24. How did they find each other?
A) They were in the same university.
B) They asked the police to help them find each other.
C) They met by chance.
D) They participated in the same training program.


25. Twins like Mark and Gerald fascinate
both average people and serious
researchers, because . . .
A) they made an outstanding scientific discovery.
B) they won a Nobel Peace prize.
C) they went to the Moon.
D) they have almost identical lifestyle despite living separately.


26. They offer researchers the chance to study . . .
A) the wildlife of South America.
B) the history of the Middle East.
C) the effect of genetic inheritance.
D) the behaviour of children.