Constructionoftherailwayshelpedtodevelopthenational_______ofTanzaniaandZambia.
Humanbehaviorismostlyaproductoflearning________thebehaviorofanimalsdependsmainlyoninstinct.
Inthefuture,more______shouldbeplacedontheeducationoftheyoung.
________withthesizeofthewholeearth,thehighestmountainsdonotseemhighatall.
Thefarmerhadtowearheavybootsinthewinterbecausethefieldsweretoowetand________.