What time were you supposed _______–At six o’clock. But I arrived at six thirty.

n’t go to that supermarket quite often, do you—-No，I only go there ________ because it’s too far away from my house.

None of the students watched the teacher______

With the help of high technology, in the past few years, electronic business __________to bank industry, travel industry

Tom realized that he ________ his physicsbook at home when he reached school．