A．He has already finished studying.         
B．He's taking a break from studying.     
C．He's looking for some information for a friend.             
D．He was assigned to watch a programme by his professor.

A．He thought she preferred to study alone.
B．He thought she had made arrangements to study with.
C．He had told her that he had done poorly on the last test.
D．He didn't know that she was enrolled in a linear algebra course.

A．He and Elizabeth argued recently.     
B．He'd rather study in his own dormitory.           
C．He heard Elizabeth did poorly on the last test.
D．He doesn't want to bother Elizabeth so late in the evening.