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

1) to protect smth. ___ damage; 2) to withdraw water ___ a river; 3) to provide ports ___ a gate or valve; 4) to be connected directly ___ the conduit; 5) to construct ___ the form ___ a half cylinder; 6) to accumulate ___ the rack; 7) to remove ___ hand; 8) to use ___ fully open or fully closed position; 9) to use ___ high heads; 10) to suit ___ flow regulation; 11) to flow ___ a spillway or ___ a sluiceway; 12) to be capable ___ smth.; 13) to find the location of the hydraulic jump ___ various conditions of flow; 14) to coincide ___ smth.; 15) to depend ___ smth.