People who ..... their neighbors' doors and ask if anyone has seen their pet instead of just calling are more likely to find it.

People who ..... their neighbors' doors and ask if anyone has seen their pet instead of just calling are more likely to find it. (*) knock off (*) knock out (*) knock on (*) knock up


This is a companion discussion topic for the original entry at https://english.best/questions/6511,people-who-___-their-neighbors-doors-and-ask-if-anyone-has-seen-their-pet-instead-of-just-calling-are-more-likely-to-find-it/