Only the good things back home are remembered. It usually takes a trip home to bring one back to reality.
A、A trip back home can help one remember his/her heritage.
B、A trip back home can help one understand what life really is abroad.
C、A trip back home can make one realize that home is the best place.
D、A trip back home can make one realize the difficulties and problems there.
【正确答案】：D
【题目解析】：题干意为：留在记忆中的全是美好的事物；通常只有回国一趟，才能使他们回到现实中来。“回到现实中来”意为发现国内存在的问题和种种困难情况。A项中heritage（遗产）与本句无关；B项意为回国可以帮助一个人理解什么是国外的生活，与原句不符；C项意为回国可以让人意识到家是最好的地方，与原句不符。答案为D。
