People who are infected with HIV are often looked down upon because social _____ against the disease runs so deep.

 Due to the widespread ________ of this medical technology，more diseases can be discovered and treated at an early stage.

There existed an obvious ________ between the accounts of the witnesses, so a judgment was not announced in court.

The rice ___ cut three weeks ago.

_______ refers to books and stories about imaginary people and events, rather than books about real people and events.