问题
选择题
The milu deer is ___ deer that ___ common in China long ago.
A．kinds of, used to be
B．a kind of, used to be
C．a kind of, to be used
D．all kinds of , to used be
答案
答案：B
a kind of 意为:一种…, used to (do/be)意为: 过去经常.