________withthesizeofthewholeearth,thehighestmountainsdonotseemhighatall.
A、IfyoucompareInthefuture,more______shouldbeplacedontheeducationoftheyoung.
Whenhesuddenly________upthesubjectofgeneticengineering,therewasanembarrassedsilence.
EachyearintheUnitedStates,manyblackteenagers_______ofschool,eitherbecausetheycannotkeepuportheyhavetoworktosupporttheirfamily.
Constructionoftherailwayshelpedtodevelopthenational_______ofTanzaniaandZambia.
WhenIcamethroughthecustomsattheairport,Ihadtopay________onaclockIhadbought.
