【2012北京】Today, computers are really helpful. They ____ everywhere.
_____ poor I am ! I ‘m going to find some part-time jobs.
Tom ______ be in his office so late that night. I saw him with his friends in the restaurant .
---How many children have you got ? ---Two , _______ of them are studying in the university.
We must pay attention to _______ the teacher carefully in class.
We __________for a picnic if it ___________this Sunday.