M: Do you know when the library is openW: It is open from 9:00 a．m．to 5:00 p．m．Monday through Friday． How long is the library open() A: 7 hours. B: 8 hours. C: 9 hours.

M: When will the bank openW: It opens from 8:30 a.m. to 6:30 p.m. from Monday .to Friday, and it opens from 9:30 a.m. to 3:30 p.m. on Saturday and Sunday. When will the bank open on Sundays（） A: From 8:30 a.m. to 8:30 p.m. B: From 9:30 a.m. to 6:30 p.m. C: From 8:30 a.m. to 6:30 p.m. D: From 9:30 a.m. to 3:30 p.m.