Thank you, dave_c! I FOUND IT at Top near my house!!!!! Thank you soooooo much for your suggestion:) I couldn't find a fresh yeast in the refrigeration section at first, so I asked at the bakery section and they have it. Fresh "Fleischmann's yeast" is sold by block(1lb), and 1block yeast cost $2. I'm happy to know that I can get fresh yeast easily now.
Thank you mrnelso! I had a chance to go to seattle downton and stopped by Big John's PFI. But they didn't have a fresh yeast.... Although I couldn't find it, that store is awesome, and I definitely will come back! Thank you again for your suggestion:)