A reward of $1,000 will be given to can provide any clues to the case which has been investigated by the police for nearly half a year.
— It _______ be Mr.Johnson who is in the office. — No, it _______ be him.I saw him off at the airport half an hour ago.
--Was the test hard? --The test was so hard that he ________ failed.
The computer is ________ to be one of the greatest inventions of the 20th century.
The seller would sell the shirt for ten yuan, but the customer ________ eight yuan.
Hardly _____ when the train suddenly pulled away.