There are citizens who support graffiti saying it’s a welcome addition to dull street.A.

问题补充：

There are citizens who support graffiti, saying it’s a welcome addition to dull street.

A. otherwise

B. rather

C. therefore

D. approximately

答案：

(答案→)A. otherwise

B. rather

C. therefore

D. approximately

解析：A. otherwise 否则，要不然，B. rather相当，C. therefore因此，D. approximately大约，句意是：有同意涂鸦的居民说这是一个让人受欢迎的举措要不然街道就会很枯燥。选A。