Model: amd → dam
1) ibremt → … 6) ahetr → … 11) ionditcon → …
2) ircb → … 7) erlifl → … 12) ledubar → …
3) elip → … 8) veridt → … 13) poryramet → …
4) twidh → … 9) tihegh → … 14) meaperble → …
5) stoc → … 10) urextim → … 15) damferofc → …
Find in the text the synonyms of the following words.
a) mixed -... c) hermetic -... e) action -...
b) sufficient -... d) solid -... f) pervious -...
Find in the text the opposites of the following words.
a) expensive -... c) deep -... e) high -...
b) permanent -... d) the worst -... f) watertight -...
Fill in the necessary preposition then choose any five items and make sentences.
1) to be made ___timber; 2) to use only ___ shallow water; 3) to be filled ___ rock; 4) a kind ___ cofferdam; 5) to vary ___ 10 ___ 40 years; 6) mixture ___ clay and sand; 7) to depend ___ conditions; 8) to wash out _____ the gaps; 9) to be low ___ cost; 10) to be used ___ cofferdams; 11) to be ___ watertight ___ possible; 12) because ___ the large base width; 13) to consist ___ circular sheet-pile cells; 14) to be necessary ___ an embankment ___ any kind.