36. We/ should/ maintain/ personal space/ avoid/ crowds/ if/ we/ want/ be/ safe/ now. * A. We should be maintained personal space and avoid crowds if we want to be safe now. B. We should maintain personal space and avoid crowds if we want to be safe now. C. We should maintain personal space and avoid crowds if we wanted to be safe now. D. We should maintain personal space to avoid crowds if we want be safe now. 37. An online meeting /going/ hold/ discuss/ how/ teach online/ next week. * A. An online meeting is going to hold to discuss how to teach online next week. B. An online meeting are going to be held to discuss how to teach online next week. C. An online meeting is going to be held to discuss how teaching online next week. D. An online meeting is going to be held to discuss how to teach online next week. 38. Getting together/ crowded places/ ban/ everywhere/ Vietnam/ now. * A. Getting together are being banned in crowded places everywhere in Vietnam now. B. Getting together in crowded places is being banned everywhere in Vietnam now. C. Getting together in crowded places everywhere in Vietnam is banning now. D. Getting together in crowded places are being banned everywhere in Vietnam now. 39. Our streets/ be/ clean if people/ stop/ litter. * A. Our streets will be clean if people stop to litter. B. Our streets will be clean if people don’t stop to litter. C. Our streets will be clean if people stop littering. D. Our streets will be clean if people don’t stop littering. 40. You are late. If you/ come/ a few minutes earlier, you/ meet/ him. * A. You are late. If you came a few minutes earlier, you would meet him. B. You are late. If you came a few minutes earlier, you would have met him. C. You are late. If you come a few minutes earlier, you will meet him. D. You are late. If you had come a few minutes earlier, you would meet him.