19. The factory / most of / has recently / its /with robots / replaced / workers /. --> ..................... 20. Mr. Vinh / a few times / has been / since / back to / he / the office / retired /. --> ......................... 67. to Sacramento / the captital city / Andrew / , which / is flying / is / of California. --> ............. 75. causes respiratory infection / NCoV, / is a contagious virus that / known as the Wuhan coronavirus, / --> .......... GIÚP MÌNH VỚI Ạ!!!