I'msorryIforgottowrite;Ihadsomuchelse________mymind.
A、over________,Johnhasbeentoseveralforeigncountries.
Inthefuture,more______shouldbeplacedontheeducationoftheyoung.
Aftersomanydayswithoutrain,thegroundquickly________thelittlerainthatfelllastnight.
Iboughtthiseighteenthcenturywritingdeskataquite________price.
Humanbehaviorismostlyaproductoflearning________thebehaviorofanimalsdependsmainlyoninstinct.