Some people who don’t like to talk much are not necessarily shy; they _____ just be quiet people. 

— I’ve taken someone else’s green sweater by mistake. — It ______ Harry’s. He always wears green. 

I'm really concerned ahout you. If something _______ happen to you  call me at once. 

Thank you very much. Without your help we ______ car started.

. — ____ I know your name ?    — Sorry , you ____ .