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.
问题描述：
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.
答
is needed
purmp
get
usually is brought
is found
must be pump
is sent
答
is needed
purmp
get
is usually bought
is found
must be pumpt
is sent