---- Where is mother?
---- She is in the kitchen. She ______ the housework all morning.

—How long have you retired, Grandpa?
—Well, four years, But you know, I         for Courtaulds for over forty years.

—No one answered when I phoned this morning. Where were you?
—I       for teeth in the dental clinic.

Toni Morrison, Nobel Prize-winning American writer, says if there’s a book you really want to read, but it ______ yet, then you must write it.

They studied what ______ since 2007 and found Australian electricity prices were among the  highest in the developed world.

A Colorado woman said that her iPhone 4 ______ fire while charging overnight.

Someone _____ his car in front of my house and it’s blocking my way.

He will have learned English for eight years by the time he _____ from the university next year.

Hello, I _______ you ______ in London. How long have you been here?

--- I haven’t seen Mary recently. And you?
--- Me neither. I’m afraid she _________ to her experiment for too long a time.