阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。
A
Urban gardens are valuable assets to communities. They provide green spaces to grow sustainable food, build community cohesion (凝聚力)，make new friends, connect with the earth, and much more. So, let's check out our list of 4 inspiring urban gardens in the US.
Gotham Greens
Where: New York &Chicago
What: Gotham Greens first started in Brooklyn and now has four locations in New York City and Chicago. Their flagship farm in Brooklyn produces over 100,000 pounds of greens per year. But it doesn't just produce healthy local vegetables. It is using high-tech greenhouses with solar panels to make sure the food grown is healthy and sustainable.
Baltimore Urban Gardening with Students
Where: Baltimore, Maryland
What:The Baltimore Urban Gardening with Students (BUGS) program encourages students to get their hands dirty and plant vegetables through their after-school and summer programs. Many of these kids don't have access to green spaces, and have never had the opportunity to grow food.
ReVision Urban Farm
Where: Boston,Massachusetts
What: ReVision Urban Farm in Boston works in partnership with the ReVision Family Home-a shelter for 22 homeless parents and their kids. The farm provides these families with information on healthy eating, and access to the farm’s fresh vegetables. The organization also provides job training to help families escape the cycle of poverty.
Swale
Where: New York
What: Swale, a floating food forest located on a large boat, is an innovative project meant to inspire citizens to rethink the relationship between our cities and our food. This urban garden serves as both a living art exhibit and an educational farm. Food forests are sustainable gardens that include vegetables, fruit, nut trees, bushes, herbs, and vines -each one complementing the other in a symbiotic (共生的) relationship.
21.What does the BUGS program mainly do?
A.Provide job training for students.
B.Use high-tech greenhouses to grow healthy food.
C.Create a sustainable garden on a large boat.
D.Offer students the opportunity to grow vegetables.
22.Which urban garden helps people get out of poverty?
A.Gotham Greens. B.Baltimore Urban Gardening with Students.
C.ReVision Urban Farm. D.Swale.
23.Where can citizens go to see a food forest?
A.Chicago. B.Baltimore. C.Boston. D.New York.
