John _______ so hard on his project that he didn't notice his mom enter the room.( )
A.worksB.has worked
C.was workingD.will work
—Listen! Someone is knocking at the door. Who _____it be?—It_____ be Tom. He phoned to visit me this evening.
---May I do the rest of the work tomorrow? ---Yes, of course. You finish it today.
---May we go home mow ?--- No, you____. You____ to go home until 5 o’clock.
Tom ______ come with us together, but he is not very sure yet.
—Whose magazine is this? —It Ben’s. It has his name on it.