Good teachers can usually give the students______ advice on their study.

The classroom iscleanit was yesterday.— Sorry, I forgot to clean it.

We were lucky to have survived the train accident. _____, the first and last car were smashed.

Would you like to go bike ridding with me tomorrow? —Sorry, I’m not . I have to meet one of my friends at the train station.

_______is my aunt, and _______are my brothers.