—You look tired.  —Yes. I _____ non-stop until twelve o’clock.   

. –Tom, go to the office to fetch the papers. Who would you rather        with you, Wang Lin or Li Feng? ---        .

I ________ ping-pong quite well, but I haven’t had time to play since the new year. 

Walmart, which is one of the largest American supermarket chains, _______ some of its store open 24 hours on Mondays through Saturdays.

---Why do you keep looking back? ---I have a feeling that we _______.