I think ______ necessary for us ______ t
题型:选择题
问题:
I think ______ necessary for us ______ the birds. [ ]
A. it ; protect
B. its; to protect
C. it's ; protecting
D. it; to protect
I think ______ necessary for us ______ the birds. [ ]
A. it ; protect
B. its; to protect
C. it's ; protecting
D. it; to protect