问题
选择题
We've tested one hundred types of boots, _______ is completely waterproof (防水的). [ ]
A. none of them
B. none of which
C. no one of which
D. no one of them
答案
答案：B
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We've tested one hundred types of boots, _______ is completely waterproof (防水的). [ ]
A. none of them
B. none of which
C. no one of which
D. no one of them
答案：B