"Smile！" I shouted， holding a yellow sign up on a busy street in Seattle． We were three thousand miles away from home on a Random Acts of Kindness and Volunteerism Road Trip． We had two aims． One was to try out our new "Smile！" signs and see how much kindness and joy we could spread in Pike Place Market． The other was to raise ﹩80 by doing street performances， enough for gas to Portland and a small hotel room．
We weren't sure how people would react （回应） to our signs． I nervously raised up our signs and shouted， "Hi， there！" to a young couple． They looked over and felt confused． Then they read our signs and broke into a smile． Before long， some tourists wanted to take a photo with us and some strangers stopped to ask us about our signs．
In fact， we paid so close attention to our "Smile！" project that we forgot the other aim． Before we knew it， the sun was setting， and we had no money for our trip to Portland． We sat down to watch a blind musician play the guitar while thinking about what to do． He was packing up when a passing crowd kicked down his change bowl． He stumbled （绊倒） into the crowd． We rushed to help him， but another man moved more quickly to help him．
Once the musician had his money safely returned， we ran over to meet the strange helper and said， "We just wanted to praise you for your good deed．" He smiled， looking at our signs． "Your trip reminds me of something similar I once did when I was young，" he said． "Look! I'd like to donate （捐赠）．" We told him， "No， thanks! We are fine． We've collected plenty of money．" We lied． "Please let me donate． It will make me feel like I'm a part of this adventure，" he insisted． And then the stranger opened his wallet and pulled out four $20 bills． The money was exactly what we had intended to raise that day． We were astonished． It seemed as if he had known somehow．



What's the main purpose of the road trip？ ______

A. To spread kindness and joy．
B. To invite more people to join in the trip．
C. To raise money for a trip to Portland．
D. To encourage people to take happy photos．

How did people react to the "Smile！" signs later？ ______

A. Disappointed．
B. Worried．
C. Interested．
D. Moved．

According to the last paragraph， why did the strange helper want to donate money？ ______

A. Because he felt pity for the author．
B. Because he wanted to join in the project．
C. Because he hoped to help the homeless．
D. Because he felt sorry for his impoliteness．

What does the underlined word "astonished" in the last paragraph most probably mean？ ______

A. Tired．
B. Satisfied．
C. Frightened．
D. Surprised．