問題詳情
3. We should not eat a wild mushroom unless we are absolutely sure that it is harmless and _____.
(A) certain
(B) audible
(C) edible
(D) reserved
(A) certain
(B) audible
(C) edible
(D) reserved
參考答案
答案：C
難度：簡單0.85
書單：沒有書單，新增
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