Immigrants who adapt most quickly usually have a background similar to the new cultural environment and they also plan to remain permanently in the new country.

A、 everlastingly
B、 probably
C、 definitely
D、 comfortably

【正确答案】 A

【答案解析】解析：everlastingly“永久地，持久地”，probably“可能”，definitely“清楚地，最终地”，comfortably“舒适地”。划线单词permanently“永久地”与everlastingly词义相近。故选A。