試題詳解

11. Which of the sentences below best expresses the essential information in the following sentence? Earth is a target in a cosmic shooting gallery, subject to random violent events that were unsuspected a few decades ago. Incorrect choices change the meaning in important ways or leave out essential information.
(A) Until recently, nobody realized that Earth is exposed to unpredictable violent impacts from spac
(E)
(B) In the last few decades, the risk of a random violent impact from space has increase
(D)
(C) Since most violent events on Earth occur randomly, nobody can predict when or where they will happen.
(D) A few decades ago, Earth became the target of random violent events originating in outer spac
(E)