30. Will you ask her about the problem? 31. When will she buy a new house? 32. Visitors must leave umbrellas and sticks in the cloakroom. 33. You should pack such items carefully in tea chests. 34. You shouldn't help him do his homework. 35. When should kids learn foreign language? 36. The government can stop the covid19 pandemic soon. 37. He can't make coffee without machine. 38. Can you take care of my kid when I am not at home? 39. How can I stop this argument? 40. You have to finish this assignment before 9 p.m 41. We are going to hold our wedding feast in New World. 42. They used to start these engines by hand. Mẫu bị động giúp mk vs