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.
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
B. is being used; is
C. have been used; are
D. has been used; are
D
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