There are lots of flowers on ______ sides of the street.

______ is a best-known secret in success that get ready in much of our life and you may make the most of the opportunity．

         of them enjoys traveling by plane.

I bought the train tickets at the station easily during the spring rush, though ________ of them ________ it.

 New traffic rules that took effect on January l, 2013 are much stricter______ than          in the past．