单项选择题

[听力原文]
W: What happened to your roommate, John I hayen’t seen him since last month when I ran into him in the laboratory.
M: He came down with flu. But now he is fine.
Q: What happened to John()



A. He moved to other university.
B. He went to the laboratory.
C. He was knocked by a car.
D. He fell ill.