______ of a sentence depends on the context in which the sentence is uttered.

EmpiricalstudiesshowthattheprocessofSLAisaprocessofconstructingandmodifyingrulesofcommunication.

We________goouttorestaurants,butmostlyweeatathome.

Johnsonwas________unknownbeforerunningforthepresidency.

If you are walking away from a clock tower ，you will hear the ticking of the clock fade to a point ________ it cannot be heard.