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
After doing part-time jobs or a week, he got a______ position as office-boy.
I've got all her records but I've never seen her_______.
I saw him _______ out of the room.
They would not allow him ________ across the enemy line.
The workers want us ________ together with them.