Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 26 to 30.

CYCLING IS GOOD NEWS – SO WHAT’S STOPPING US?
The government's recent campaign, providing encouragement to leave our cars at home and get on our bikes, has been successful to some (26) _______, with a slight increase in the numbers cycling to work. We all now know that cycling is beneficial - cyclists have (27) _______ health problems than non-cyclists, they have higher levels of fitness and they don't damage the environment.
(28) _______ we won't become a nation of cyclists until we overcome two major barriers. First, exhaust fumes in heavily congested streets can be as harmful to the lungs as cigarette smoke. So there must be a greater (29) _______ of cars and bikes in towns. Perhaps more importantly, town planners must ensure
(30) _______ destinations for daily needs, such as schools, work and shopping, are within convenient cycling distance from home.
(Adapted from Cambridge English Grammar and Vocabulary for Advanced by Martin Hewings and Simon Haines)