A：Hi，Darren．Do you like to ride your bike around the city？

B：（56）___ Cycling can help us save energy，and it's easy to park．

A：I agree，but I don't like cycling at all．

B：Why？

A：（57）___ What must I do if I want to go cycling？

B：First，you should never ride too fast．

A：That's easy，I'll ride slowly．（58）___

B：Second，you can wear bicycle helmets when riding．

A：（59）___ What else？

B：（60）___ And you should also learn more about the traffic rules．

A：I see．I'll take a bicycle and have a try next week．

A．What'snext？

B．That'sagoodidea．

C．BecauseIthinkit'snotsafetorideabike．

D．Third，wearlight-coloredclothesifyourideatnight．

E．Ofcourse，Ido．