While solving Sentence Correction questions, a lot of test-takers rely on their ear to give them the answer, which is why one often hears the phrase, “this option doesn’t sound right”. While the ear does play a very important role, it more important to listen with a purpose. When it comes to Standard Written English, which is what is tested on the GMAT as well as other tests, it is important to listen for structure. Different sentences have different structures based on their construction. In this post, let us look at one type of structure, comparatives, with help of a sentence correction question from the Official Guide (OG). Unlike the buildings in Mesopotamian cities, which were arranged haphazardly, the same basic plan was followed for all cities of the Indus Valley: with houses laid out on a north-south, east-west grid, and houses and walls were built of standard-size bricks. (1) the buildings in Mesopotamian cities, which were arranged haphazardly, the same basic plan was followed for all cities of the Indus Valley: with houses (2) …