1 -it is clear from the passage that

85 -Harry Houdini ---- .
A) was an Indian who performed his tricks mostly in Europe and the USA
B) was a famous magician who lived about a hundred years ago
C) was the least safety -conscious chemist of the Victorian era
D) used to buy all his chemicals in Indian bazaars
E) had his life changed by a visit to India


86-It is stated in the passage that --- .
A) the sort of magic Houdini performed a century ago can be seen in India today
B) Houdini's kind of magic died out because it was boring, due to its extreme safety
C) famous magicians such as Houdini perform in Indian bazaars
D) Houdini cheated his audiences because he used chemicals instead of real magic
E) India has produced some of the most famous magicians in the world


87 -The author believes that ---- .
A) we can easily find the chemicals used by Houdini anywhere in the world
B) the people in the West no longer like magical performances
C) Westerners are more interested in their safety now than, In the past
D) Houdini took the secrets of his craft to India before he died
E) chemicals needed by magicians should be freely available to everyone


There are two kinds of water pollution. The first is when rubbish, sewage or chemicals are thrown into the water. This waste upsets the natural environment and can prove dangerous or fatal to fish and other life in the water. The second type of pollution is thermal, or warm water pollution. This is most commonly caused by hydroelectric power plants. These take water from a lake or river, convert it into steam for running the plant's turbines, change the steam back into water, then return the water to the original lake or river. Though this water is no dirtier than when it was taken out, it is often five to ten degrees above its original temperature. This causes a change in the environment which can be as dangerous to, aquatic life as waste 'pollution.