I hate people _______ don’t help others when they are in trouble. [ ]

_____is it? — It’s twelve. [ ]

Do you know______man in white?－Oh, he is_________ scientist from America.

I knocked on the door several times but answered, so I left.

Do you know your head teacher’s telephone number? I have something important to tell her.—Sorry, I can’t remember. Pleasein the telephone book.