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题目
a great deal of water(need)____in large cities.some cities(purmp)____water from wells.others(get)____water from lakes or rivers.water___(usually bring)to a place higher than the city itself.but when water(find)____in lower place,it(must pump)____up to the city.then it(send)___to each home.

提问时间:2020-07-26

答案
is needed
purmp
get
is usually bought
is found
must be pumpt
is sent
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