Assault and homicide in Newtown are believed _________ a popular topic of common concern.
(A)that is
(B)to be
(C)to being
(D)being
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統計: A(20), B(61), C(16), D(15), E(0) #403323
統計: A(20), B(61), C(16), D(15), E(0) #403323