阅读下列短文，从每题所给的四个选项（A、B、C和D）中选出最佳选项，并在答题卡上将该项涂黑。
A
Summer of Culture
“What is your teen doing this summer?”
Welcome a student from France or Spain into your family!
Host a student from Spain or France and experience his/her life and culture.
Exchange students from Spain and France are looking for welcoming, warm, fun and loving hosts who will share life and culture with them for a few weeks in June, July and August. Stays can be from 3 to 6 weeks.
What to do with your exchange student:
Movies/Museums/Beaches/Cooking/Baking/Community
projects/Volunteering/Hanging out/Shopping/Disneyland/anything you can think of...
Requirements to host:
Loving, active, outgoing family
One stay-at-home, or part-time host parent
Teen in the home within 4 years of age of the exchange student
Willing to take students to places of interest once a week
(maybe visiting them next summer in their home countries)
If you are interested and would like more information, please contact:
Shirley Wentzell 909×××6715
21．Exchange students from France or Spain will possibly stay for ________ in host families.
A．10 days B．5 weeks C．2 months D．1 year
22．According to the passage, we can learn that ________.
A．exchange students will come back next summer
B．exchange students have to cook dinner by themselves
C．parents in a host family should have full-time jobs
D．teens in host families can experience different cultures
23．The text above is probably a ________.
A．letter B．notice C．poster D．diary
