问题
选择题
It's not always easy for the public to see _____________ use a new invention can be of to human life.[ ]
A. whose
B. which
C. what
D. that
答案
答案：C
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It's not always easy for the public to see _____________ use a new invention can be of to human life.[ ]
A. whose
B. which
C. what
D. that
答案：C