A、Monday, Wednesday, and Friday. B、Tuesday and Saturday. C、Tuesday and Thursday. D、Saturday and Sunday. C周二、周四计算机实验室晚上9点关门，C项正确。

W: I can’t tell if my breast is still there. Have you taken it off?
M: No, Mrs. Green. We just took out the lump. So you can see we’ve caught this thing very early and some X-ray therapy should stop spreading.
Q: What is the woman suffering from？

W: What time does the computer lab close?
M: On Monday, Wednesday and Friday, it closes at 5 p.m. On Tuesday and Thursday, it opens until 9. It stays open until 6 on Saturday. But on Sunday, it’s closed all day.
Q: On which evening is the computer lab open?