With the help of the computer, information can ____every corner of the world swiftly.

What were you doing when I called you at 8 p.m. yesterday?—I the piano at that time.

Mr. Zhang said that he would be punctual for the appointment, _______ he were late?

A heavy snow promises a good harvest, _____ is often the case.

Hello, Sandy. This is Jack. What are you doing?— I’m watching a match. It started at 7 p.m. and _____ on for another half an hour.