Mike hardly puts up his hand in class, ________ he— ________, he is one of the most active students in our class.

Who ______ it be that hasn’t handed it in yesterday? ——It _______ be Bob. He handed it in yesterday.

wasin the middle of my call because I had no more pennies to put in the box.

North Korea threatens to ________ from six-party talksaimed at ending North Korea’s nuclear program unless its proper rights are tobe satisfied．

（2014年(春)重庆市高三考前冲刺测试卷）3May I see your ticket please? I think you _____ in my seat.–Oh, you are rightI’m terribly sorry