题目：Four B&R countries use English as one of the official languages. Where are these countries mainly concentrated in ?
Southeast Asia and South Asia.
Central Asia and Eastern Europe.
West Asia and North Africa.
Eastern Asia and Western Europe.
题目：Four B&R countries use English as one of the official languages. Where are these countries mainly concentrated in ?
Southeast Asia and South Asia.
Central Asia and Eastern Europe.
West Asia and North Africa.
Eastern Asia and Western Europe.
