题目内容

When climbing the hill John was knocked unconscious by an _____ rolling stone.

A. untouched
B. unexpected
C. unfamiliar
D. unbelievable

试题答案

B
相关题目
When climbing the hill John was knocked unconscious by an _____ rolling stone.
[     ]

A. untouched
B. unexpected
C. unfamiliar
D. unbelievable

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