1. Kathy always blows me off. Who does she think she is?2. How many no shows were there at your party?3. 10 registered people did not show up at the conference.
 blow somebody off no show did not show upBlow X off 表示毀了X的約會, 也有可能是X根本就拒絕我的約會
I have been wrecking my bain on this tough math question but I still cannot solve it.