The fourth revision is correct. it says who was strolling in the sidewalk.
Cell phones must not be banned in classrooms -
Because its specific about the topic the place where the topic shouldn't banned at and has an argument as to why.
Teachers and educators often explore way-
this one seems like an option to but the way its written is more of like a statement in my opinion than an argument cause it doesn't specify how they take advantage
these two seem like your best anwser
Explanation:
Juneau buck only not vist
Tom is baking a cake - present tense
Present tense: a tense expressing an action that is currently going on or habitually performed, or a state that currently or generally exists.
