885 Sce5-9 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
key: E OG上的解释如下:Choice E is best. The pronoun that in A and B should be deleted, since the pronoun one is sufficient to introduce the modifier and the sentence is more fluid without that. In B and C, it and that it are intrusive and ungrammatical: the idiom is "believe x to be y." In the context of this sentence, the infinitive to be is more appropriate than the limited present-tense is in referring to an event that occurred long ago but has been discovered only recently. Finally, A, B, and D lack o/and so illogically equate this particular explosion with the whole class of explosions to which it belongs: it is not a type but possibly one of a type.
885补充第3题: The department defines a private passenger vehicle as one registered to an individual with a gross weight of less than 8,000 pounds. (A) as one registered to an individual with a gross weight of less than 8,000 pounds (B) to be one that is registered to an individual with a gross weight of less than 8,000 pounds (C) as one that is registered to an individual and that has a gross weight of less than 8,000 pounds (D) to have a gross weight less than 8,000 pounds and being registered to an individual (E) as having a gross weight of less than 8,000 pounds and registered to an individual
key: C as one that is registered to an individual and that has a gross weight of less than 8,000 pounds 那么这个“that”在这里算不算是多余的呢?