<p>The doctors were going to the hospital to save lives.</p> <p>Firefighters were fighting the fire in Liangshan.</p> <p>They were inspecting Hangzhou.</p> <p>They were fighting the virus.</p> <p>She was looking for WIFI classes on the mountain.</p> <p>When China was falling ， they were rising.</p> <p>When they were far away ， the virus was nearing</p> <p>When we were at home ， they were fighting the virus.</p> <p>She was laughing when she was crying.</p> <p>While mother was cooking, she was washing.</p>