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ChooseNOMORETHANTHREEWORDSANDORANUMBERfromthepassageforeacha
swer
Questio
s2024
Usethei
formatio
i
thepassagetomatchtheadva
tagesa
ddisadva
tagesofthetwosystemshorizo
talflowsystema
ddow
flowsystemlistedAHbelowWritetheappropriatelettersAHi
boxes2024o
youra
swersheet
20istheadva
tageofthedow
flowsystemHowever21a
d22arethedisadva
tagesofthedow
flowsystem23a
d24arethetwobe
efitsofthehorizo
talflowsystemHoweverit’slesseffectivea
defficie
t
AItca
dealwithamoreseriouslypollutedefflue
tBIthasmorebedstha
theotherCIt
eedslessco
trola
ddoes
’t
eedtobetake
careofallthetimeDItrequiresalotofguida
ceEItca
’tworkallthetimebecausethepool
eedstimetoresta
drecoverafteracertai
periodFIt’salotmorecomplicatedtobuildthesystemGThesystemiseasytobebuiltHItco
sumeslesswater
Questio
s2526Choosetwocorrectlettersfromthefollowi
gABCDorE
Whatarethetwobe
efitsof
aturalbedsystemswhe
comparedtotheco
ve
tio
alsystemsAOperatio
does
otrequireelectricityorfuelsupplyBThey’revisuallygooda
de
viro
me
talfrie
dlyCNomecha
icalsystemsarei
volvedDThey’reeasilytobebuilta
dcostlessETheydo
otbreakdow

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