In those days ,books could only be produced one at a time _____________.
He speaks _____ English ______ French.Instead, he speaks German.
--Have you seen _________ film where are we going, Dad? --Yes, it’s quite ______ interesting film so that I have seen it twice.
Father’s Day is coming. I’m thinking about _______.
People thought _____ hard to live without the medicine.
It’s a duty for friends to ________ each other when they are in trouble.