— Why didn't you go to the cinema with us that afternoon?
— I______ at the station for my uncle from Beijing.
A：was waiting
B：have waited
C：am waiting
D：will wait
乙烷在光照条件下与氯气发生取代反应，理论上得到的氯代物最多有几种（ ）
判断对错．
柴鸡蛋每千克售价4.8元，妈妈要买98千克鸡蛋，带480元钱足够了
比一比，再组词。
脸____ 习____ 麻____
检____ 叼____ 床____
