Hi,<br/><br/>Are these correct?<br/><br/>1. How many people are there in that room?<br/><br/> About 400. or Around 400??<br/><br/>2. What color <u>is or are</u> your shoes? <br/><br/> My shoes <u>are </u>yellow??<br/><br/>3. which one is correct?<br/><br/>... those that cover certain region.<br/><br/>or<br/><br/>... those that cover a certain region.