Ensure you are on the correct page (typically around page 125-130 depending on the edition) to match the exercise text.

To verify an unstressed ending, replace the word with a 1st declension noun that has a stressed ending, like река or земля . For example: по аллеЕ (like по рекЕ ).

Answers the questions О ком? О чём? (About whom? About what?). Apply the Rule