It is now clear that no such creatures as vampires have been seen and none been

游客2023-12-31 6

问题 It is now clear that no such creatures as vampires have been seen and none been found in the world.

选项 A、was found
B、are found
C、have been found
D、have been found out

答案 A

解析本题考查时态。句意为：很清楚的是，没有人见过吸血鬼这种生物，世界上也没有人发现过。发现这个动作发生在过去，所以用一般过去时。所以，答案是A。

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