_______ we _______ the new policy for economy, we would never have bought the house.

—Will you read me a story, Mummy? —OK. You _____ have one if you go to bed as soon as possible.

—Don’t forget to take the message to my teacher.—_____.

He insisted that his plan _______ carried out at once. 

—How’s your tour around the North Lake? Is it beautiful?—It ________ be, but it is now heavily polluted.