36.B. We should maintain personal space and avoid crowds if we want to be safe now.
37.D. An online meeting is going to be held to discuss how to teach online next week.
38.B. Getting together in crowded places is being banned everywhere in Vietnam now.
39.C. Our streets will be clean if people stop littering.
40.A. You are late. If you came a few minutes earlier, you would meet him.