A.
To announce a holiday
B.
To recruit clean-up volunteers
C.
To change school policies
D.
To plan a field trip
正确答案:B
译文
Read an email.

Dear Student Council,
Our school has been invited to participate in the annual City Clean-Up Day on May 5th. We need 50 student volunteers to help clean Riverside Park from 9:00 AM to 12:00 PM.
Volunteers will receive:
• Community service hours• Free lunch• A commemorative t-shirt
There will be a sign-up meeting this Thursday at lunch in Room 201. If you can't attend but want to help, email Mr. Davis by Friday. This is a great chance to represent our school and help the environment!
Thanks,
Martin Lee