30. Which requirements must be followed and which ones should be followed? Use the ideas in the box below.
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must (not) |
should (not) |
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1) The cost of real estate for the reservoir … |
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2) A suitable dam site … |
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3) The quality of water … |
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4) The reservoir site … |
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5) Areas productive of sediment … |
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6) A deep reservoir … |
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7) The quantity of leakage … |
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a) … exist, e) … have adequate capacity, b) … be excessive, f) … be preferable, c) … be avoided, g) …be computated. d) …be satisfactory, |
31. Choose the best endings to the following statements.
1. Waves may do harm to the structures…
a) which are located far from the water.
b) located near the water.
c) situated above the water.
2. Wind tide is caused by…
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a) the action of wind. |
b) the action of waves. |
c) the action of water. |
3. Waves are caused by…
a) the action of the wind.
b) the action of water.
c) the tangential forces between the wind and water.
4. When waves grow in size, their speed…
a) increases. b) reduces. c) falls.
5. Growth of wind speed and wave speed stops when…
a) the wind speed disappears.
b) the speeds become equal.
c) the waves reach the shore.
6. In the reservoir only winds occurring …
a) during the season of minimal water level should be considered.
b) at the period of maximum water level should be considered.
c) in winter and summers should be considered.
32. Read the text again, title it and make a plan of it.
33. Make a short summary of Text С.
34. Find the synonyms of the following words in the text.
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1) to appreciate - … |
5) selection - … |
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2) to start - … |
6) to be situated - … |
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3) to increase - … |
7) seepage - … |
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4) to stop - … |
8) velocity - … |
35. Find the opposites of the following words in the text.
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1) smooth - … |
4) excellent - … |
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2) deep - … |
5) to find - … |
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3) impossible - … |
6) to decrease - … |
36. Fill in the correct prepositions, then choose any three items and make sentences.
1) to be located not ___ ___ sth; 2) ___ some depth; 3) to blow ___ a water surface; 4) to move ___ the same speed; 5) to be preferable ___ sth; 6) ___ a result.
37. Write the following sentences out in full.
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necessary / must / one / by the end / of / the / investigations / carry out / May.
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that / It / year / the construction / is / the reservoir / last / was completed / of.
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difficult / it / kind / to / processes / control / is / this / of.
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the reservoir site / should / pay / one / attention / to / the choice / special / of.
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was / pointed / who / it / water / the chief engineer / the / minimal / level / the reservoir / in.
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not / a dam / to / it / build / and / is / a reservoir / easy.
