[单项选择]

Some people think they have an answer to the problem of automobile crowding and dirty air in large cities. Their answer is the bicycle or "bike".
In a great many cities, hundreds of people ride bicycles to work every day. In New York City, some bike (67) have even formed a group (68) "Bike for a Better City. " They (69) themselves that if more people rode bicycles to work there would be fewer automobiles in the downtown section of the city and (70) less dirty air from car (71) .
For several years this group has been trying to get the (72) government to help bike riders. For (73) , they want the city to draw bicycle lanes for bicycles only— (74) some of the main streets. If riders use the (75) lanes as cars, there may be (76) Bike for a Better City feels that if there were (77) lanes, more people would use bikes.
But no bicycle lanes hav
A. good
B. special
C. broad
D. safe

Some people think they have an answer to the problem of automobile crowding and dirty air in large cities. Their answer is the bicycle or "bike".
In a great many cities, hundreds of people ride bicycles to work every day. In New York City, some bike (67) have even formed a group (68) "Bike for a Better City. " They (69) themselves that if more people rode bicycles to work there would be fewer automobiles in the downtown section of the city and (70) less dirty air from car (71) .
For several years this group has been trying to get the (72) government to help bike riders. For (73) , they want the city to draw bicycle lanes for bicycles only— (74) some of the main streets. If riders use the (75) lanes as cars, there may be (76) Bike for a Better City feels that if there were (77) lanes, more people would use bikes.
But no bicycle lanes hav
A. happenings
B. conflicts
C. events
D. accidents