Hi,<br/><br/>Are the following sentences natural to a native ear?<br/><br/>1. This organ is nothing but an inconvenience at the best.<br/><br/>2. What you have an upset stomach? Isit just hurting or you have to go to the washroom frequently?<br/><br/>3. This guy runs through a pack of cigarettes in a day.<br/><br/>Thanks,<br/><br/>MG.