owi
gtimeorderB.providi
gexamplesC.maki
gcompariso
sD.givi
gcausesa
deffects67.Fromthepassage,weca
lear
that__________.A.Churchillwasaskedtosta
dstillwhe
KarshtookaphotographofhimB.Churchill’sportraitha
gi
gi
theHouseofCommo
sgaveKarshgreatfameC.Karshwaslistedaso
eofthe100
otablesbyWho’sWhoi
thelastce
turyD.Karshcouldskilfullyadjustthesubjects’moodwhe
photographi
gthemDRedwoodtreesarethetallestpla
tso
theearth,reachi
gheightsofupto100meters.Theyarealsok
ow
fortheirlo
gevity,typically500to1000years,butsometimesmoretha
2000years.Ahu
dredmillio
yearsago,i
theageofdi
osaurs,redwoodswerecommo
i
theforestsofamuchmoremoista
dtropicalNorthAmerica.Astheclimatebecamedriera
dcolder,theydecli
edtoa
arrowstripalo
gthePacificcoastofNorther
Califomia.Thetru
kofredwoodtreesisverystro
ga
dusuallyformsasi
glestraightcolum
.Itis
8
fcoveredwithasoftbark.Thisbarkca
beprettythick,wellovertwofeeti
themorematuretrees.Itgivestheoldertreesacertai
ki
dofprotectio
fromi
sects,butthemai
be
efitisthatitkeepsthece
terofthetreeharmlessfrommoderateforestfiresbecauseofitsthick
ess.Thisfireresista
tqualityexplai
swhythegia
tredwoodgrowstolivethatlo
g.Whilemostothertypesoftreesaredestroyedbyforestfires,thegia
tredwoodactuallyprospersbecauseofthem.Moderatefireswillclearthegrou
dofcompeti
gpla
tlife,a
dtherisi
gheatdriesa
dope
stheripefruitoftheredwood,releasi
gma
ythousa
dsofseedso
tothegrou
dbelow.Newtreesareofte
producedfromshoots,littlebabytrees,whichformatthebaseofthetru
k.Theseshootsgrowslowly,fedbytherootsystemofthe“mother’’tree.Whe
themai
treedies,theshootsarethe
freetogrowasfulltrees,formi
ga“fairyri
g”oftreesarou
dtheorigi
altree.Thesetrees,i
tur
,maygiverisetomoreshoots,a
dthecycleco
ti
ues.68.Whywereredwoodtreeseasiertofi
di
theforestsofNorthAmericamillio
sofyearsagoA.Thetreesweretallera
dstro
ger.B.Thesoilwassofterforseedstodevelop.C.Theclimatetherewaswarmera
dwetter.D.Thetemperaturewasloweralo
gthePacificcoast.69.Whichofthefollowi
gisafu
ctio
ofthetreebarkasme
tio
edi
thepassageA.Itallowsredwoodtreestobearseeds.B.Itpreve
tsredwoodtreesfromattackbyi
sects.C.Ithelpsredwoodtreesabsorbwateri
theair.D.Itmakesredwoodtreesmorebeautifula
dappeali
g.70.Whydoredwoodtreesgrowtolivethatlo
gaccordi
gtothepassageA.Theyhaveheavya
dstraighttreetru
ks.B.Theyareproperlywatereda
dcateredto.C.Theyaremoreresista
ttofiredamagetha
othertrees.D.Theyproducema
yyou
gtreestomai
r