[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