Supposeyoufindabrightyellowbikeonastreetcornerinthecity．Youhoponitandrideaway．Butwait-isn'tthis（51）s？Nooneshouts，"Stop!Thief!"That（52）bthisfreerideisjustfinewiththecity．Youcanfind

Question

Suppose you find a bright yellow bike on a street corner in the city．You hop on it and ride away．But wait-isn't this （51）s___？No one shouts，"Stop!Thief!"That（52）b___ this free ride is just fine with the city．
You can find （53）h___ of free yellow bikes in some U．S．cities．The idea began in Portland，Oregon，in 1994．People saw a need for （54）f___ transportation，and they wanted to help （55）c___ pollution．So，to get citizens out of their cars and onto pollution free bikes，they （56）s___ the Yellow Bike Project．
The public bike are （57）p___ bright yellow and placed throughout the city．People can hop on a yellow bike and ride to work to school，or to run errands．They then leave the bike for the （58）n___ rider．There have been times when bikes have been stolen，but most people obey the（59）r___．What would be the point of stealing something that's already free？
Portland's （60）i___ quickly became popular．Within two years of its start similar programs were set up in cities in six other states．

Answer 1

51．答案：stealing/strange 前面提到一种情形--骑走原本不是自己的自行车，再结合空格后一句"No one shouts"（没有人喊叫），这种情形很奇怪，属于偷窃行为，结合首字母提示为s，可以推测出词语为形容词str...