Odd one out.

a) a channel, a canal, a flume, a check, a tunnel, a filled pipe

b) clay, asphalt, cement mortar, concrete, steel, gunite

c) pine, fir, redwood, cypress, paint

d) rectangular, circular, liner, triangular, semicircular, horseshoe

e) turnouts, wasteways, overchute, settling basins, depressions

f) a chute, an intake structure, a long section, an outlet

Make verbs from the following nouns.

Model: destruction → to destruct

characteristic → … location → … reduction → …

lining → … elevation → … dissipation → …

change → … facility → … excess → …

collection → … collapse → … accumulation → …

galvanization → … evaporation → … pollution → …

diversion → … regulate → … avoidance → …

Match the words with their synonyms.

1) elevation 8) improve a) barrier h) overflow

2) regulation 9) act b) collect i) operate

3) accumulate 10) obstruction c) control j) level

4) excess 11) avoid d) use k) better

5) satisfactory 12) facilitate e) pass l) escape

6) employ 13) cross f) line m) develop

7) cover 14) superior g) assist n) suitable

Fill in the correct prepositions then choose any three items and make sentences.

1) ___ some cases; 2) to take the form ___ a tunnel; 3) because ___ the velocity; 4) to be similar ___ smth.; 5) ___ either case; 6) to construct below ___ the point of water diversion; 7) to return back ___ the river; 8) as much ___ 90 per cent; 9) to be sluiced ___ the canal; 10) to convey water ___ the terrene; 11) to line ___ gunite; 12) to act ___ pressure conduit.