问题补充:
— Do you have any plan for this summer vacation, Mary?
— Sure, I’ d like to be a volunteer and help to the Central Park.
A. put up
B. call up
C. clean up
D. cheer up
答案:
A. put up
B. call up
(答案→)C. clean up
D. cheer up
解析:考查词组。put up张贴,举起:call up 打电话;clean up 清理,cheer up 使兴奋;这里句意:我想成为一名志愿者帮助清理中心公园。