[选择题,2分] It usually takes a trip home to bring one back to reality.
A. Usually one has to pay a visit to his home country before he knows that his home country B. Usually one has to take a trip away from before he knows that his home country is not perf C. Usually one has to pay a visit to his home country before he knows that his home country i D. Usually one has to take a trip away from home country before he knows that his home count