What does the phrase “one on a side” mean?
the neighbor repairs his side of the wall while the speaker watches.
the speaker and the neighbor repair the wall from the same side.
the speaker repairs his side of the wall while the neighbor watches.
the speaker and the neighbor repair the wall from opposite sides.

The last option                                                                                                                                                                                                                

Go on google and it will show it

Acquiring english is a way of learning where you learn english by birth, this includes listening to your parents, brothers and sisters and on the whole learning it from the environment around you while mastering standard english need qualified institutes and teachers who make certain programs and syllabus to you master the standard english. this also can include a long session of academic studies before you can master the standard english.standard english is necessary for literary works, official usage and writing materials for standardized publications or when someone needs to speak publicly. in most cases the employers of a company also demand and like the use of standard english from their employees.