---Why did you major in Literature? ---I________ listened to my mother. She wants me to major in Business.
—A shy boy like John ________ give up a secure job and start his own business!—Yes,nobody had expected that.
—Tom often drives carelessly.—Tell him he ________ answer for it if he goes on behaving like that.
He ________ your car by mistake because he didn't have the keys.
—The similarities between social networks are striking.—That ________ come as no surprise,because they are all products of the Internet.
—Hi,Joan.Any idea where Tom is?—He ________ on the playground.I saw him there playing football just now.