----- Nội dung ảnh ----- How many ethnic groups do we have in Vietnam? How many ethnic group does we have in Vietnam? How many ethnic groups did we have in Vietnam? How many ethnic groups we have in Vietnam? 36. You are not allowed to move when the traffic light is red. A. You needn’t move when the traffic light is red. B. You don’t have to move when the traffic light is red. C. You have to stop when the traffic light is red. D. You mustn’t stop when the traffic light is red.
