Questions 7-11 Complete the summary below
Choose NO MORE THAN TWO WORDS from the passage for each answer.
Using Non-Food Crops to Make Biofuels
A major constituent of green plants is cellulose. The
(7)of cellulose are
made up of sugars. These form of the (8)of plants. Ethanol could be produces by
extracting the sugars and allowing them to (9). One common North America plant
that could be used in this method is (10). Some scientists believe that this would be
a more productive source of ethanol than (11). Additionally, the source plant
materials could be grown in ground which is not currently being used for agriculture and
is not
(12) valuable

Everyone at least once asked themselves what happiness is. Congratulating the friends, relatives and acquaintances we always wish them happiness, because we believe: the main thing in life is to be happy. But the concept of happiness we all put a different meaning, for some, happiness is love, others believe that the welfare and money, others will respond that health and life. I think that different times in our life, we for the happiness take different values. After all, sometimes even that same person today we need for happiness love and family, tomorrow money and career, and after a while, he needs health, luck and success.

Rikki-Tikki-Tavi - a young mongoose, the main hero of the story. During a flood he has been carried away by water flow from parents.  Waking up, he finds himself in the garden of the house where the British family lives. He has protected their son from a poisonous snake Kara (banded krait) and immediately becomes their friend.  Soon he explores the house and garden and meets with their inhabitants: bird-tailor Darcy and his wife, musky rat Chuchundra — and encounters with cobras Nag and Nagini. Rikki-Tikki-Tavi discovers that Cobra want to kill the people which are living in the house. Later at first he comes into the fight with Nag, then with Nagini, and then destroys them unhatched cubs to save his friends.