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