Catherine, _______ the alarm clock for 6 o’clock, or you would oversleep and be late for the train.[ ]

________ you don’t lose heart, I’m sure you can pass the coming examination

Does Potter like playing computer games—No, he __________. He only likes reading books.

But for the arrival of the police, you __________ killed yesterday.

Only when public attitudes towards thedisabled advance as far as laws have ________ be able to take the rightfulplace in society.