题目内容
Every necessary means____ to protect milu deer which____ very valuable to us. As a result, the number of milu deer is increasing.
|
A.are used; is |
B.is being used; is |
|
C.have been used; are |
D.has been used; are |
【答案】
D
【解析】略
练习册系列答案
相关题目