1. An agency is hired to spray herbicide on the sidewalks in front of a building to kill weeds. A city ordinance is then passed that forbids use of herbicides on public thoroughfares. The contract can be terminated due to ________.
changed circumstances
termination by ratification
termination by impossibility
indemnity
2. If a painter who is contracted to paint the exterior of a house does NOT finish the job, he has violated his duty to ________.
perform
pass standards
provide
notify