行活动中用"微笑！"标牌来传播善意和快乐。

　　1．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.

　　答案与解析：A　细节理解题。根据第一段的"... on a Random Acts of Kindness and Volunteerism Road Trip."可知，此次志愿者旅行活动的主要目的是传播善意和快乐。

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

　　A．Disappointed. B．Worried.

　　C．Interested. D．Moved.

　　答案与解析：C　推理判断题。根据第二段的"Before long, some tourists wanted to take a photo with us and some strangers stopped to ask us about our signs."可知，后来，人们对标牌很感兴趣。

　　3．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.

　　答案与解析：B　细节理解题。根据最后一段的"'Please let me donate. It will make me feel like I'm a part of this adventure，'" he insisted.可知，这位男士是想参与到这项志愿活动中来。

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

　　A．Tired. B．Satisfied.

　　C．Frightened. D．Surprised.

　　答案与解析：D　词义猜测题。根据画线词后面的"It seemed as if he had known somehow."可知，作者他们一行人很"吃惊"，好像这位男士早知道他们需要80美元一样。

　　B

Many people like travelling, but they cannot take their dog