Why would some workers in Foxcon die _____ continue working in the factory? — Psychologists say they are under too much pressure. [ ]

Attention, please. The plane has to be _____ because of the heavy rain.— Oh, bad luck! We have to wait now.

Can you go to the concert with us? –Sorry, I can’t．I have ________homework to do and I’m _______tired.．

All the living thingson the sun.

To do some voluntary work for the 2nd Youth Olympic Games is ______ excellent chance for us to serve our hometown—Nanjing.