Please give Jim the schedule for tomorrow’s conference when he （） back. He is to chair the conference.

单项选择题His father was put into （） prison, and he had to go to （） prison to visit him once in a while.

A. a; the
B. the; a
C. a; /
D. /; the

单项选择题The student continued his university study （） his family was poor.

A. even though
B. as though
C. now that
D. since