I frequently text my friends on my mobile phone, but I'm not like some people who always use their phones, even when they go out with friends. I am using it at the moment because I am revising with some friends tomorrow (our exams start on Monday) and we are trying to decide where to meet. Texting helps you organise your life, but shouldn't dominate it.
The different tenses in Grammar refer to the use of the verbs in a certain way that will help specify the 'time' of the event. In other words, tenses help us understand the events, whether it is in the past, present, or the future.
In the given blanks, the use of the verbs in parenthesis will be based on the structure of the words. And by using either the simple present or the continuous form, we can understand what events/verbs are done frequently or things we do all the time, or occurring at the same time it is talked about.