What'sthedifferencebetweenamonkeyandaflea(跳蚤)
Whatisblackwhenitiscleanandwhitewhenitisdirty
What5-letterwordhassixleftwhenyoutake2lettersaway
Whatisthecenterofgravity
TheletterV
Amonkeycanhavefleas,butafleacan'thavemonkeys
Ablackboard
aroboticdogasolarenergycarLifeinthefuturehealtheducationtransportationhousefoodclothessportsartsculturebusinessBrainstormWhatlifeinthefuturewillbelike
livecommunicateVideophoneVideochatonlineshoppingOnlineshoppingmallSmartcardsSchoolontheairtravel1
Inthepast,there______notreesleftinoraroundthevillage
havebeen2
What________inthepastfewyears
changedB
hadchangedC
haschangedD
havechanged3
Alotofwork_______inthepastmonth
hasdoneB
havebeendoneC
wasdoneD
hasbeendone3
few前有past,last,every等时,few前就不能有a
inthepast/last2