--Are you satisfied with the air today? --Not at all, it’s so foggy that I often get a cough. I think we all need much ________air to breathe.

Although he’d eaten up two bowls of rice, he still didn’t feel ____.

I feel ______ because my job is too ______.

The camera is __________ expensive __________I can’t afford it.

Shanghai is larger than________ city in Gansu.