TOEFL TPO -1 Writing Task 2 Sample: Gaining control over SARS-CoV-2, the novel coronavirus causing COVID-19 pandemic, requires accurate and rapid diagnostic testing. Such testing is widely performed by using Polymerase Chain Reaction (PCR) methods; however, the accuracy of PCR detection with throat swab samples is acknowledged to be lower than that of chest CT. State the reasons why PCR methods cannot serve as definitive tests of SARS-CoV-2, and be sure to use the terms“false positive” and “false negative”in your explanation. • LingoLeap