Some people get in touch with each other by mobile phones__________ others keep contact with each other by e-mail. A. while B. before C .when C. since
He _______a good idea finally.
——Ann is in hospital. ——Oh, really? I_______ know. I_______ go and visit her.
_______ is important for us to learn English well.
My father used _______in front of his house and he got used to _______like that.
Rather than _______on a crowded bus, he always prefers _______a bicycle.