boomtangboy wrote:
9. Astronomers at the Palomar Observatory have discovered a distant supernova explosion, one that they believe is a type previously unknown to science.
(A) that they believe is
(B) that they believe it to be
(C) they believe that it is of
(D) they believe that is
(E) they believe to be of
@boomtangboy - Please read the forum rules before posting any questions. Make sure to properly underline SC questions to avoid any confusion.
Explanation - believe to be is the correct idiom. Comes down to
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