题目内容
NASA has made a ________ that our earth has no threat associated with the film 2012 which is based on pure myths.
| A．clarification | B．classification | C．identification | D．presentation |
A
考查名词辨析。clarification澄清，classification分类，identification辨别身份，presentation呈现，根据语境是NASA已经澄清了我们的地球没有威胁，所以选A。
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