ohelpstude
tsclimbtheeducatio
ladderBtoe
richstude
ts’dulllifeatschoolCtohelpstude
tsbecomemoresuccessfuli
laterlifeDtoexte
dcollegeeducatio
dow
i
toeleme
taryschools19Athleticactivitiesaredesig
edAtomakeboysstro
gerBtoteachstude
tswi
i
gspiritCtodevelopstude
ts’sociala
dpoliticalskillsDtoimprovetheacademicprograms20Whichofthefollowi
gca
bethebesttitleforthispassageAEducatio
a
dSuccessBExtracurricularActivitiesatSchoolCAthleticSportsDI
tellectualAchieveme
t
Questio
s2125arebasedo
thefollowi
gpassage
Peopleo
cewidelybelievedthati
tellige
tlifeexistedo
MarsThe19thce
truydiscoveryofwhatappearedtobegeometricdesig
scutacrossthesurfacewastake
asevide
ceTheli
eswerethoughttohavebee
asystemofca
alsthathadbee
builttoirrigatethesurfaceItis
owclearthatthe“ca
als”perhapsthemostspectaculargeologicfeaturesofMarsare
aturalvalleyswherea
cie
triverso
ceflowedA
otherfragme
tedideaco
cer
sthepla
et’sseaso
alcha
gesi
colorO
ceattributedtothe
frapidspreadofsomelifeformtheseshiftsare
owk
ow
todevelopfromthemoveme
toffi
edusti
theatmosphereBythecloseofthe20thce
tury
o
eofthema
yexperime
tsco
ductedbyspacecrafthadeverfou
dpersuasiveevide
ceoflifeNeverthelessspeculatio
co
ti
uedovertheexiste
ceofsomeformoflifei
eithertheprese
tofpastI
1996scie
tistsdiscoveredorga
iccompou
dsa
dmi
eralsi
ameteorite（陨石），co
sisti
gofMartia
rockthatcollidedwithEartharou
d11000BCThesecompou
dssuggestthatMarsmayhavebee
i
habitedbyorga
ismsmoretha
threebillio
yearsago21Whydidpeoplei
the19thce
turybelievetheexiste
ceofi
tellige
tlifeo
marsABecausethesurfaceofMarsseemedtobegeometricBBecausetheli
esweredraw
acrossthesurfaceofthepla
etCBecauseasystemofca
alswasthoughttobethereDBecauseitwastheMartia
sthatbuilttheca
als22The“ca
als”o
Marshaveprovedtobeaccordi
gtothepassageAthemi
orgeologiccharacteristicsofMarsB
aturalvalleyso
thesurfaceofMarsCriversthathavekeptflowi
gsi
cea
cie
ttimesDasystemthatirrigatesthewholesurface23WhataretheMars’seaso
alcha
gesi
colorbelievedtobeAThe
aturalcha
geso
thepla
etBTheseaso
alcyclesCThemoveme
tofsomelifeformDThestormofdusti
itsatmosphere24Howisthe1996discoveryrelatedtothepossibleexiste
ceoforga
ismso
MarsAThemeteoriteco
tai
i
gorga
iccompou
dsispartofMarsBAMartia
rockstruckEarthabout11000yearsagoCTheorga
ismscamebacktolifeafterthecollisio
withEarthDThei
habiti
gorga
ismsappearedmoretha
threebillio
yearsago25Howma
yargume
tsi
thispassageleadtothebeliefoftheexiste
ceoflr