Unique to the nation, _____ are the source for a common nickname

Unique to the nation, _____ are the source for a common nickname for New Zealanders.
A、rare kakapo
B、saddlebacks
C、moas
D、kiwis
【正确答案】：D
【题目解析】：
答案选D。Unique to the nation, these birds are the source for a common nickname for New Zealanders, Kiwis.参见教材P313。