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
I had ________ supper at my friend’s last Sunday and ________ food was very delicious.
Jack offered us a big meal when he was leaving the office, but our work ____, we refused it.
For him __________ stage is just __________ means of making a living.
He is known _____ a scientist and famous _____ his research on rice.
Can you lend me the magazine _____ last week?