A、From9:30a.m. to5:00p.m. on Fridays. B、From9j30a.m. to8:45p.m. on weekdays. C、From 9:30 a.m. to5;00p.m. on weekdays. D、From 9:3

　　Welcome to Ealing College of Higher Education (ECHE). Today I will talk about student services at the college. All student services are to be found in the North Building. (16) Social life and some of the welfare services are run by the Student Union, of which all students are automatically members. After enrolment, take your receipt to the Student Union and they will give you your student card. Your student card also entitles you to membership in the Student and Staff Club. The Student Union will give you a handbook which gives more details on all the services offered plus more information on the health service, accommodation and so on. Let’s talk about medical services first. ECHE has a student health center. (17) The center is open from 9:30 a. m. to 8:45 p. m. , Monday to Thursday and from 9:30 a. m. to 5:00 p. m. on Fridays during term time. The college doctor, Dr. Kearns, holds a surgery in the medical center four days a week: Monday and Tuesday mornings, Thursday afternoons and either Wednesday or Friday afternoons. (18) Appointments for these surgeries are made through the nurses and are usually for the following day. Besides these times, Dr. Kearns can be found at her surgery which is located at No. 2 Ascott Avenue. During your stay in England, you must register with a local doctor and if you live in the London Borough of Ealing, you can register with Dr. Kearns.
　　16. What does the speaker say about the Student Union?
　　17. When is the student health center open?
　　18. What do we learn about Dr. Kearns?