A person riding a bicycle uses very little energy（能源）to make the bicycle move，and there is no pollution at all when you are riding．
1．Even so，in developed ，most people don't go to work by bicycle．
A．world B．countries C．land D．earth
2．It is not because the bicycles are expensive or people feel tired if they ride to work．It's because cars on the roads becomes larger．
A．the number of B．a number of
C．this kind of D．all kinds of
3．It certainly becomes to ride a bicycle．As a result，more people put their bicycles away and go to work in their cars，and in this way，the situation（情形）is made more serious．
A．safer B．more dangerous
C．much dangerous D．safe
4． the best way to make riding safer and more popular is to create paths（开设通道）only for bicycles，and to make it so difficult and expensive for drivers to take their cars into the city that they will go back to use their bicycles．
A．Hardly B．May be C．Perhaps D．Nearly
参考答案：
1---4 BABC
