问题
选择题
It is very important ______ the wild animals. [ ]
A. for us to protect
B. of us to protect
C. for us protecting
D. of us protecting
答案
答案：A
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It is very important ______ the wild animals. [ ]
A. for us to protect
B. of us to protect
C. for us protecting
D. of us protecting
答案：A