题目

完形填空 After along day at school, I walked home with my heavy schoolbag.Sleepy and 1, I threw my things on the couch and grabbed something from the2 toeat. Ipassed by the living room and wished I could watch TV,but I knew my 3 would take me the whole night.I took my schoolbag and went4 tomy room. I triedto understand chemistry and5 sleepiness at the same time.I was stressed out and 6. I wanted something to cheer me up. Later,I 7the sound of the frontdoor opening. And I waited for it—the sound of my mom singing.8 she sings off-key(跑调),it made me excited that she washere. I randown t类型：世界上的居民可以分为、和三大人种；不同的人种之间相互通婚，还形成了人种。