题目内容
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
B
解析:
a kind of 意为:一种…, used to (do/be)意为: 过去经常.
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It was not until all the milu deer ________ that we realized we should build a natural park to protect them.
A.died off |
B.died away |
C.died out |
D.died down |