I chose Barcelona because I (1) _____ it's a great example of a green city. There are lots of buses here and people often ride their bikes to school or walk. There is also a metro system and cable cars. I think that the pollution from cars is a really big (2) _____ , so Barcelona is a green city because it encourages people to take other forms of (3) _____  instead of their cars. Also, there are lots of parks in the (4) _____  of the city because it strongly believes in keeping the city green and healthy. The parks have lots of grass and trees and the air (5) _____  is very good. People (6) _____  to them to relax, to have lunch or to play sports. 

1.  ABCD

A. imagination                B. guess                    C. think                         D. consider

2.  ABCD

A. complication              B. problem               C. operation                 D. situation

3.  ABCD

A. transport                      B. vehicle                 C. travel                        D. movement

4.  ABCD

A. middle                          B. inside                   C. zone                          D. area

5.  ABCD

A. standard                      B. condition             C. quality                      D. level

6.  ABCD

A. visit                             B. arrive                      C. go                              D. move