EXERCISE 20. Fill in the gaps with the missing words in the following sen- tences. The first letter of each word has been given to help you.
1. The USA e… from the Atlantic Ocean in the east to the Pacific
Ocean in the west. 2. The USA c… the fourth largest territory in the
world. 3. The USA b… Mexico in the south. 4. We should mention the s…
of the country. 5. Many rivers are f… through the country. 6. The natu-
ral channels are cut by r… 7. There are vast area of f… soil in the USA.
8. He speaks Spanish, the second most c… language in the USA. 9. The
piece of land, set a… by the federal government for the nation's capital, is
between the states of Virginia and Maryland. 10. There are thirteen s… on
the American flag.
Of course they looks ugly, but they make useful things such as collecting rubbish. But also this insects have disadvantages too and this disadvantages are really very serious! The mail problem of them it's their ability to spread infections.
In conclusion i want to add that we need to overcome problems which connected with insects, but we mustn't kill them, because insects also make a lot of usefull things for us.