C. Snacks and bottled water. D. Baby seats and children's trailers.

22.What can cyclists do on the Waterfront Greenway& Central Park Bike Tour ?

A. Boat on the Hudson River . B. Sightsee Brooklyn Heights .

C. Drive cars on the Greenway bike path D. Appreciate local architecture .

23.Which of the following can offer cyclists tour guides?

A. Central Park Bike Tour . B. Brooklyn Bridge Bike Tour.

C. Brooklyn Bridge Bike Rental. D. Waterfront Greenway& Central Park Bike Tour .

B

　　　A pile of shoes on a front porch( 门廊) isn't anything out of the ordinary for most households, but for Heather Duckworth it held a special meaning during her sons' 18th summer.

The mom, who has an11-year-old daughter, 18-year-old twin sons, and a 20-year-old son, wrote a heartfelt post about seeing a pile of shoes outside her door and all that it represents," These shoes mean that I have a house full of kids, mostly teenagers, in their summer holiday. These shoes mean there is probably no food left in my house. These shoes mean noise and mess but laughter and music as well."

When Duckworth returned from work and saw the shoes recently, they brought on a wave of sadness because she realized that things were changing. Most of the kids who wear the shoes have just graduated from high school and she realizes that time is precious in her 18th summer with her sons. She continues that she knows seeing the shoes in the house means that the kids are safe, but soon all the shoes will be "spread across college campuses "and she knows "all of these shoes might not find their way back home next summer as life takes them on new adventures."

The time might be bittersweet, but Duckworth wants to focus on creating happy memories rather than focusing on the sadness that could come. She is going to be thankful for the shoes and enjoy every moment with the kids.

The sentimental post generated a massive amount of interest with it being shared over 88,000 times in a week and receiving 14,000 comments. Duckworth was touched by the comments and how the story resonated(共鸣) with so many . She responds." What a gift you all have given me in knowing that I am not alone in feeling this way. Motherhood is hard, but w are all in this together!"

24. What do the shoes mainly mean for Heather Duckworth?