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are Jay and Ana old friends?

1. Billy usually sits near the window, but now he is sitting in front of the teacher. 
2. The Smith always spend their holidays at the seaside. They are on holiday now. They are at the seaside. 
3. Sorry I can't play with you now because I am doing my homework. 
4. I never use the calculator at school. 
5. Can you help me please. I am trying to turn on the computer. 
6. Every day my mother tries to teach my little brother how to do morning exercises.