Which verb tense is for an ongoing past action that was interrupted by another action in the past, emphasizing that the ongoing action is over?
example: john had been washing his car all morning, but quit when the rain came.

Which best compares the authors’ purposes in silent spring and “save the redwoods”? both authors want readers to protect human rights. both authors want readers to focus on saving trees. both authors intend to entertain readers with their essays. both authors intend to convince readers of their viewpoint.