.--- I thought you were going to call on me last night. --- Sorry, I __________. But I had to finish the report.
He said it was _____ impossible to buy the novel which was _____ worth reading.
It is thought that one billion people in the world, _______is half the word’s workers, earn their living by farming.
I wonder ______ you were doing last night.
______ won’t be long ______ National Day comes.
I’m afraid nobody but his parents or Jim, his best friend, _____ the secret.