Variant 1 You could have come first and won the race if you … faster

21. What is the main idea of the text?

A) The description of the hummingbird’s body. B) The pigmentation of the hummingbird.

C) The speed of hummingbird wing’s beat. D) The sounds of the hummingbird.

22. The word SPARSE in the passage refers to:

A) dense B) united C) thin D) thick

23. As it is inferred in the text, what is the main cause of the unique color and look of hummingbirds?

A) The feathers’ color structure. B) The pigmentation of the feathers’ structure.

C) The colorful flowers’ structure. D) The speed of flight.

24. As it is stated in the text all the facts about hummingbird wings’ beat rate are WRONG EXCEPT:

A) Smaller birds have lower rate. B) All the birds have rate of 80 beats per second.

C) It hasn’t been fully investigated yet. D) Larger birds have higher rate
Vitamin C occurs most abundantly in oranges, lemons, grapefruit, and raw tomatoes and cabbage. Several other fruits and vegetables, including potatoes, contain lesser amounts. It is, however, easily destroyed by cooking. Vitamin C is necessary for the development of bones, teeth, blood vessels, and other tissues, and plays a part in the functioning of most of the cells in the body. Deficiency shows itself in painful haemorrhages around the bones and in swollen, bleeding gums, a condition called scurvy. For a long time, in the days when a sailor’s diet consisted of salted and dried food and ship’s biscuits, scurvy was the curse of sailors on long voyages.