Aliens are borrowed words which have retained their original pro

Aliens are borrowed words which have retained their original pronunciation and spellingWhich of the following words belongs to aliens?
A、kowtow
B、port
C、mother tongue
D、long time no see
【正确答案】：A
【题目解析】：Aliens are borrowed words which have retained their original pronunciation and spelling.(外国人是保留了原有发音和拼写的外来词。)